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HealUA: A Mobile Application for Medical Professionals Research and Data Analytics Women in Medicine Medical English for physicians and medical students Clinical Observerships for Ukrainian Physicians Quality and Safety Centers of Excellence Neurosurgery & Neurorehabilitation Centers of Excellence Nursing Centers of Excellence Oncology Center of Excellence Prosthetics and Rehabilitation GMKA Ukraine The Aid for Ukraine Webinars “Medosvita: The Path For Changes”Educational platform

Internal Medicine

Gastroenterology Cardiology Geriatrics Internal Medicine

Oncohematology Hematology

Urologic Oncology Dermatologic Oncology Upper Gastrointestinal Oncology Lower Gastrointestinal Oncology Breast Oncology Prevention and Screening Hematologic Oncology Head and Neck Oncology Hepatopancreatobiliary Oncology General Oncology Rare Oncological Diseases Thoracic Oncology Sarcomas Gynecologic Oncology

Obstetrics and Gynecology

Gynecology Gynecologic Oncology

Palliative Care

Palliative Care

Otorhinolaryngology

Head and Neck Oncology

Professional Development

Leadership and Management

Psychology Psychiatry

Physical Therapy/Rehabilitation

Prosthetics Physical Therapy Rehabilitation

Military Medicine

Military Surgery Trauma Care - ATLS

Quality Improvement Program

Standard Operating Procedures (SOPs)

Orthopedics and Traumatology Anesthesiology and Intensive Care

Anesthesiology Intensive Care

Neurosurgery Vascular Surgery Cardiovascular Surgery Colorectal Surgery and Proctology Plastic and Reconstructive Surgery General Surgery Endoscopy Thoracic Surgery Maxillofacial Surgery Endocrine Surgery Emergency Surgery Trauma Care - ATLS Breast Surgery Military Surgery

Oncourology Urology

Oncodermatology

Research and Analytics

Research and Analytics Research Methodology Statistical Analysis

Emergency Medicine

Emergency Medicine Disaster Medicine Protection from Biological, Chemical, Nuclear Attacks

The Transfemoral Gait Deviation Diagnostic Matrix: A Clinical Cheat Sheet for Physical Therapists and O&P Specialists Anxiety and Depression in Patients with Serious Illness General Oncology Managing Nausea in the Cancer Patient Population General Oncology Invasive Breast Cancer: NCCN Guidelines for Patients Breast Cancer Pulmonary Metastasectomy Lung Cancer Surgical Management of Recurrent Rectal Cancer Lower Gastrointestinal Cancer Management of Radiation Exposure Emergency Medicine Radiation Therapy for Locally Advanced Rectal Cancer Lower Gastrointestinal Cancer Neuroendocrine Tumors of the Appendix Lower Gastrointestinal Cancer Management of Colorectal Cancer Liver Metastases Lower Gastrointestinal Cancer First Aid for Eye Injuries in War and Disaster Emergency Medicine Diagnosis and surgical management of early stage breast cancer Breast Cancer Abdominal Vascular Trauma Trauma Surgery Gastrointestinal Stromal Tumors General Oncology Melanoma Skin Cancer Chest wall tumors Lung Cancer Immunotherapy for Head and Neck Cancer Head and Neck Cancer Amputations of the Upper and Lower Extremities Plastic and Reconstructive Surgery Systemic Therapy for Sarcomas Sarcoma Clinical Management of Acute Traumatic Spinal Cord Injury Trauma Surgery Cricothyroidotomy Trauma Surgery Cervical Cancer: NCCN Guidelines for Patients Gynecologic Oncology Early-Stage Non-Small Cell Lung Cancer Lung Cancer Nasopharyngeal Cancer: NCCN Guidelines for Patients Head and Neck Cancer Adjuvant Olaparib for High-Risk, Early Breast Cancer in BRCA1/2 Pathogenic or Likely Pathogenic Variant Carriers: Implications for Clinical Practice Breast Cancer Acute Wound Care Trauma Surgery Colon cancer: diagnosis, treatment, and emerging frontiers Lower Gastrointestinal Cancer Skin Grafting for Burns and Trauma Plastic and Reconstructive Surgery Clinical Practices and Guidelines For Esophageal Leiomyoma Uncategorized Enhanced Recovery After Surgery in Colorectal Surgery Lower Gastrointestinal Cancer Thymic Malignancies Lung Cancer Consensus Statement on the Use of OncotypeDX in Patients WithResected, Hormone Receptor Positive and HER2-Negative, EarlyBreast Cancer: An Update of the Criteria for Reflex Testing Breast Cancer Palliative Care for Colorectal Cancer Lower Gastrointestinal Cancer Breast Cancer Pharmacology Breast Cancer Surgical Management of Peritoneal Metastases from Colorectal Cancer Lower Gastrointestinal Cancer Management of Appendiceal Adenocarcinoma Lower Gastrointestinal Cancer Rectal Injuries Trauma Surgery Traumatic Bleeding and Wound Management: Trauma and Emergency Education Emergency and disaster medicine Oropharyngeal Cancer: NCCN Guidelines for Patients Upper Gastrointestinal Cancer Pelvic Fractures Trauma Surgery Consensus Statement Regarding Use of Trastuzumab Deruxtecan (T-DXd) in Patients with Metastatic, HER2-low Breast Cancer Breast Cancer Gynecologic Cancer Pharmacology Gynecologic Oncology Consensus Statement Regarding use of Adjuvant Abemaciclib in Patients with Early-Stage, Hormone-Receptor-Positive Breast Cancer Breast Cancer Esophageal Cancer: symptoms, staging and treatment Upper Gastrointestinal Cancer Soft Tissue Coverage Plastic and Reconstructive Surgery Oral Cancers: NCCN Guidelines for Patients Head and Neck Cancer Personalized Colorectal Cancer Management in Older Adults: Summary and Recommendations Lower Gastrointestinal Cancer Craniomaxillofacial Trauma Trauma Surgery Management of Peripheral Vascular Trauma Trauma Surgery Geriatric Trauma Patient Trauma Surgery 6 Proven Strategies to Prevent Delirium in Older Adults Management of Genitourinary Trauma Trauma Surgery Malignant Pleural Mesothelioma Lung Cancer Malignant Pleural Effusion Lung Cancer Hand and Upper Extremity Injuries – Diagnosis and Treatment Plastic and Reconstructive Surgery Initial Evaluation of the Pediatric Trauma Patient Emergency Medicine Tracheostomy Trauma Surgery Ultrasound: Focused Assessment with Sonography for Trauma (FAST) Exam Trauma Surgery The Diagnosis and Management of Gallbladder Cancer Upper Gastrointestinal Cancer Post-operative complications following thoracic oncology procedures Lung Cancer Burn Injuries Emergency Medicine End-of-life care General Surgery Trauma Considerations for the Pregnant Patient Trauma Surgery Consensus Statement Regarding Use of Pembrolizumabin Patients With Early-Stage Triple-Negative Breast Cancer Breast Cancer Blast Injuries Emergency Medicine Treatment of Acute Burns Trauma Surgery Lower Extremity Fasciotomies Trauma Surgery Crush Injury Trauma Surgery Cancer and recommendations for Covid-19 vaccination General Oncology Distress During Cancer Care: NCCN Guidelines for Patients General Oncology Liver Injury Trauma Surgery Endometrial Cancer Gynecologic Oncology Intrahepatic Cholangiocarcinoma Upper Gastrointestinal Cancer Management of Adnexal Masses Gynecologic Oncology Cardiac Trauma – Blunt and Penetrating Trauma Surgery Thoracic Trauma Trauma Surgery Young-Onset Colorectal Cancer: Current State of Knowledge and Future Perspectives Lower Gastrointestinal Cancer Duodenal Trauma Trauma Surgery Bereavement Support: Supporting Children, Adolescents, and the Care Team Palliative Care Gender-Based Violence in Ukraine Psychological care Soft Tissue Injuries Of The Face Plastic and Reconstructive Surgery Workup and Evaluation of Patients with Rectal Cancer Lower Gastrointestinal Cancer Pharmacotherapy Overview in Gastroesophageal Cancers Upper Gastrointestinal Cancer Rectal Cancer: Local Excision Lower Gastrointestinal Cancer Management of the Early-Stage Prostate Cancer Genitourinary Oncology Current Diagnostics and Treatments for Pancreatic Neuroendocrine Tumors Upper Gastrointestinal Cancer Traumatic Colon Injuries Trauma Surgery Breast Cancer Ovarian Cancer: NCCN Guidelines for Patients Gynecologic Oncology Early and Locally Advanced Non-Small Cell Lung Cancer: NCCN Guidelines for Patients Lung Cancer Extremity and Trunk Soft Tissue Sarcoma Sarcoma Colon Cancer: NCCN Guidelines for Patients Lower Gastrointestinal Cancer Mass Causality and Triage Emergency Medicine Metastatic Breast Cancer: NCCN Guidelines for Patients Breast Cancer Venous Access Trauma Surgery The role of genetic testing and risk stratification in breast cancer prevention and screening Breast Cancer Diffuse Large B-Cell Lymphomas: NCCN Guidelines for Patients Hematologic Oncology Rape, Sexual Assault, and Sexual Violence Emergency Medicine Pancreatic Injuries in Deployed/Austere Settings Trauma Surgery Trauma Laparotomy Trauma Surgery Ductal Carcinoma in Situ Breast Cancer: NCCN Guidelines for Patients Breast Cancer Desmoid tumors Sarcoma Diagnosis and Management of Shock in the Injured Patient Emergency Medicine Advanced-Stage Prostate Cancer: NCCN Guidelines for Patients Genitourinary Cancer Update on Management of Cervical Cancer Gynecologic Oncology Germ Cell Tumor Lung Cancer Chemical Warfare: Trauma and Emergency Education Emergency Medicine Colon and Rectal Cancer Pharmacology Review Lower Gastrointestinal Cancer Upper Extremity Fasciotomies Trauma Surgery What to do when a person is found down: Trauma and Emergency Education Emergency Medicine Ovarian Cancer Gynecologic Oncology Management of Premalignant Lesions of the Endometrium Gynecologic Oncology Pancreatic Cancer Upper Gastrointestinal Cancer Neuroendocrine Tumors of the Colon and Rectum Lower Gastrointestinal Cancer Treatment of life-threatening injuries on initial survey Trauma Surgery Procedure: Splenectomy General Surgery Traumatic Small Bowel Injury Trauma Surgery Early Prostate Cancer: NCCN Guidelines for Patients Genitourinary Cancer Gastric Adenocarcinoma Upper Gastrointestinal Cancer Metastatic Non Small-Cell Lung Cancer: NCCN Guidelines for Patients Lung Cancer The Role of Transanal Total Mesorectal Excision (TaTME) in the Surgical Management of Rectal Cancer Lower Gastrointestinal Cancer Neck Trauma Trauma Surgery Surgical Management of Patients with Rectal Cancer: LAR/APR Lower Gastrointestinal Cancer Enhanced Recovery After Surgery (ERAS) in Gynecologic Oncology Gynecologic Oncology Melanoma of unknown primary Cancer of unknown primary

Michael J Wagner, M.D.Vitaliia Popovych, MD Alona Topikha, MD Maksym Barsa, MD, PhD Taras Ivanykovych Viktoriia Myroniuk-Danko, MD Lina Kryvoruchko Anna Karavska, MD Christina R. MacRosty, DO Jared Howell, MS, CPO, LPO, FAAOP Debra S. Holbrook, MSN, RN, SANE-A, FNE A/P, DF-AFN, FAAN Katie J. O’Conor, MD, MBA Kevin Venus, MD, FRCPC Sameer Kushwaha, MD Tannaz Ranjbarian, MD Samantha Phua Yayi Huang, MD, FRCPC Lianne Tile, MD, MEd FRCPC Karen Ng, MD, FRCPC Meah Gao, MD, MSc, FRCPC Qinghua Yao, MD Inna Gong, MD, PhD Galyna Shabat, MD, MSc, PhD Izzati Zulkifli Tommy Alan Brown, II, MD Jennifer Fu, MD Tarek Abdelhalim, MD, FRCPC Stephanie Cham, MD Jessica D.St. Laurent, MD Michael J.Worley Jr., MD Savo Bou Zein Eddine, MD Mustafa Turabi, MD Abdu Sharkawy, MD, FRCPC Andrii Burets, MD Barbara Liu, MD, FRCPC Fartoon Siad, MD, MSc Laura Rodger, MD, FRCPC Jennifer Korman, BScPhm, ACPR, RPh Samik Doshi, MD Tetiana Karpenko Sarabeth A. Spitzer, MD Jennifer S. Davids, MD Yuliia Novytska, MD Ravindra Uppaluri MD, PhD Parisa Fallah, MD Kostenchak-Svystak Olha Mariana Kuryk, MD Michelle Davis, MD Maryann Zhao Andrii Nikolaichuk, MBA Xavier P. Fowler, MD Ivanna Koval Eleni Tsiola, MD Vanessa Welten, MD, MPH David P. Mooney, MD, MPH Anna Malovanna, MD Ilona Sviezhentseva, PhD Saar Yaniuta, MD, SRC Dmytro Androshchuk, MD Dr. Cassidy Anne Muir, MD Anastasiia Ostapenko, MD Danylo Yakubovskyi Andrii Khomenko, MD Lauren M Cramer, LICSW Emily Z. Keung, M.D., A.M.Elise F. Nassif, M.D., M.S.Daniel Shalev, MD Abby C.Larson, MD Kateryna Potapova, MD Mariia Stupchuk, PhD Natalia Miltsaryk, MD Matthew C. Carroll, MD Joseph D. Phillips, MD Inna Vilshanivska, MD Inesa Huivaniuk Yana Babenko Viacheslav Kopetskyi, MD Dr. Barry Gibney Marta Antoniv, MD Lesya Strilka, MD Anna-Mariia Breysacher, MPH, MSc Robin R. Cotter, MD Astra Meliksetian, MD Tetiana Kondratiuk, MD, PhD Sofiya Hrechukh, MD Tetiana Slipchenko, PhD Anna Kulish, MD Ronald Bleday, MD Panagiotis Tasoudis, MD Naomi Shimizu, MD Marika Osterbur Badhey MD, PhD Kei Suzuki, MD MS FACS Karri Hester, MD, MS Ju Ae Park, MD Jason K. Sicklick, MD, FACS Eleanor M Frechette, LICSW Ashwyn K. Sharma, MD Ariel Shalev, MD Ivan Hornik, MD Inna Tsymbalenko, MD Iaroslava Evtishchenko Armin Abadeh, MD Nelya Melnitchouk, MD, MSc, FACS Maksym Khrapak, MD Yoshiko Iwai, MD Wendy Tsang, MD, SM, FRCPC Sherif Youssef, MD, FRCPC Anna Goulding, MD, FRCPC Michael Ruiz, MD, MSc Kevin Singh, MD, MClSc, FRCPC Sofiia Livshun, MSc Oksana Sulaieva, PhD Ciara Pendrith, MD, MSc Jason M. Long, MD, MPH Juan Duero Posada, MD, FRCPC Tiffany Bellomo, MD Thais Faggion Vinholo, MD, MSc Serguei Melnitchouk, MD, MPH Scott Fung, MD, FRCPC Sarah M. Kling, MD, MPH Megan L.Sulciner, MD Linda M. Pak, MD Katherine He, MD, MS John Kuckelman, MD Garrett M. Nash, MD, MPH, FACS Faina Nakhlis, MD, FACS Daniel Wiener, MD Benjamin E. Haithcock, MD Antonia Kreso, MD, PhD Zach M. Feldman, MD, MS Vanessa Leong Stephanie L. Nitzschke, MD Sangki Oak, MD, MPH Samuel J. Enumah, MD, MBA Rebecca Tang, MD Priti Lalchandani, MD Patrick Heindel, MD Marilyn Heng, MD, MPH, FRCSC Jahan Mohebali, MD, MPH Glenn LaMuraglia, MD Geoffrey Andrew Anderson, MD, MPH Eric Garfinkel, DO David V. Feliciano, MD, FACS, MAMSE Asa M. Margolis, DO, MPH, MS Anupamaa J. Seshadri, MD Alaska Pendleton, MD, MPH

Medical courses

UCOPE Ukraine Clinical Oncology Project ECHO Lecture Series: Introduction to Surgical Health Services Research (isHSR)Management of Enterocutaneous Fistulas and Abdominal Wall Reconstruction Perioperative Patient Management: A Multidisciplinary Approach Quality and Safety in Nursing 2.0 'Principles of Surgery' Online Course [Completed]Case-Based Lecture Series for Clinicians: Anticoagulation Stewardship International Neurosurgery Course for Ukrainian Specialists Advanced Course on Polytrauma and Organ Support Emergency Care for TBI: Assessment, Treatment, Evacuation [Completed]Quality and Safety Course for Ukrainian Healthcare Professionals Quality and Safety in Nursing

GMKA coordinator took part in the World Cancer Congress The Founder of GMKA Trains Ukrainian Surgeons in Lung Transplantation At the Forefront of Oncology: GMKA Supports Ukrainian Physicians' Participation in ASCO Annual Meeting 2026 GMKA Enhances HealUA with AI Translation to Deliver Real-Time Global Expertise to Ukrainian Physicians Ukrainian Oncologists Strengthen Patient Care Through U-COPE Virtual Course by GMKA and MD Anderson Cancer Center Save a Life: GMKA participated in development of emergency and trauma care training curriculum Access to cancer treatment during the war - results of scientific research GMKA’s COO Participates in The Norwegian Health Summit in Minneapolis to Strengthen Global Healthcare Collaboration Strengthening Ukrainian Healthcare Through Global Collaboration: GMKA Executive Director Completes Training in Quality and Safety at Sunnybrook Hospital My goal, is to bring the best experience to my Ukrainian colleagues - Dr. Daria Simchuk, who started an internship in the USA Shared Knowledge, Stronger Care: GMKA Supports Advanced Endoscopy Training Through Observership Program GMKA Ukraine Co-Executive Director Represents Ukraine and Highlights HealUA at AAN Annual Meeting 2026 GMKA’s Chief Strategy Officer Advocates for Ukrainian Healthcare at the Annual NeuroTech Convention of SBMT 2025 A Course Held in Poland for Ukrainian Physicians: GMKA Member Among the Organizers War and the fragility of anticancer drug supply networks in Ukraine — Abstract GMKA on the AACR Podcast: Cancer Care in Wartime Ukraine GMKA and Mass General Brigham Experts Strengthen Trauma Care in Ukraine with Free Virtual Training HealUA App Receives Support from Seeds of Bravery and Earns the European Commission’s Seal of Excellence Experience That Improves Care: Ukrainian Physicians Complete Training at Boston Children’s Hospital with GMKA Support Global Medical Knowledge Alliance та україно-швейцарський проєкт «Розвиток медичної освіти» підписали меморандум про співпрацю GMKA and the Ministry of Youth and Sports of Ukraine Sign Memorandum of Understanding to Advance Adaptive Sports and Rehabilitation Medicine GMKA Won a Prestigious Award at the Massachusetts Chapter of the American College of Surgeons 2024 Annual Meeting GMKA Forum “Quality and Safety in Healthcare”: Advancing Practical Solutions for Stronger, Safer Care in Ukraine The Founder of Global Medical Knowledge Alliance (GMKA) spoke at the European Cancer Summit HealUA Mobile App Featured at Clinton Global Initiative 2025, Highlighting Ukrainian Innovation in Healthcare Transformative Journey: A Ukrainian Oncologist's Inspiring Experience in the USA Solomiia Semeniv Showcased GMKA Work at IFSO-EC 2025 Galyna Shabat, Patiens Education Director of GMKA, was involved in the EFS Meeting in Italy HealUA Mobile App Connects Ukrainian Physicians with Global Experts for Case Support and Second Opinions Leading UTHealth Houston Expert Visits Uzhhorod Neurosurgery Center Through GMKA Initiative to Advance Stroke Care in Ukraine Surgical education in Ukraine during the war - study published in World Journal of Surgery GMKA Shares Exclusive Opportunity for Ukrainian Surgeons: Free Enrollment in Colorectal Surgery Course from Harvard Medical School & ISUCRS GMKA Publishes Results of the First National Study on Quality of Colonoscopy in Ukraine HealUA Mobile App Featured on Radio Health Journal, Now Available as a Podcast The GMKA team presented five contributions at the 12th Annual Symposium on Global Cancer Research GMKA’s Director of Oncology Program Honored with Yvonne Humanitarian Award for Supporting Cancer Care at the Time of War in Ukraine Building Trauma Care Capacity: GMKA Partners with WHO to Deliver ATLS Training in Ukraine The GMKA Team Participated in the World Cancer Congress 2024 GMKA’s "Women in Medicine" Initiative Celebrates One Year of Impact GMKA’s Role in Strengthening Ukraine’s Healthcare System Highlighted at NATO Event in Toronto GMKA and Leading Experts from the University of Nebraska Medical Center Partner with Lviv Physicians to Advance Liver Transplantation in Ukraine GMKA was first introduced at the prestigious ‘South by Southwest’ conference in the USA Ukrainian Nurses Completed GMKA Virtual Course on Quality & Safety GMKA founders presented at the Massachusetts General Hospital Department of Surgery Grand Rounds Surgical Education for Ukrainian Doctors: GMKA's 'Principles of Surgery' Online Course Completed in June My motivation is to learn from the best specialists in order to develop Ukrainian medicine — Olga Kostenchak-Svystak GMKA and Experts from Baylor Global Health and Texas Children’s Global Health Train Ukrainian Clinicians in Rehab and Prosthetics Advancing Ukraine’s Healthcare Through International Collaborations: GMKA Co-Organizes Heal Ukraine 2025 Conference at Harvard United for Progress: Highlights from the First National Forum "Women in Medicine: Professional Growth and Leadership"HealUA App Recognized for Its Social Impact at Web Summit 2024 GMKA's Quality and Safety Program Presented at the 2025 European Pancreatic Club Meeting A Transformative Experience: Lesya Strilka, a Lviv Plastic Surgeon sub-specialising in Burns, Reflects on Her US Internship Patient experience with cancer care before and after the war in Ukraine — Abstract GMKA’s Research in the World Journal of Surgery Demonstrates the Impact of Women’s Leadership on Reducing Gender Bias in Surgery GMKA helped the MOH of Ukraine to update the Clinical Practice Guidelines for Combat Trauma Care GMKA Showcases U-COPE Course Results at ESMO 2025, Demonstrating Effective Cancer Care Training During Wartime GMKA-Led Initiative to Advance Surgical Quality and Safety Presented at E-AHPBA 2025 Global Medical Knowledge Alliance Presents Key Research Findings at the American College of Surgeons Clinical Congress 2024 GMKA Team Attends the American Association for Cancer Research Annual Meeting 2025 “Never Stop Learning”: Two Ukrainian Physicians Reflect on GMKA-Supported U.S. Observership to Improve Burn Care in Ukraine GMKA Presented Key Findings from National Cancer System Assessment GMKA and Mission Gait Collaborate to Enhance Amputation Recovery in Ukraine Blood donation in Ukraine - GMKA Podcasts debunk myths and reveal facts GMKA Neurosurgery Course for Ukrainian Specialists – Outcomes and Insights Announcing a reconstructive plastic surgery observership in the USA A Course for Physical and Rehabilitation Medicine Physicians in Lviv Held with GMKA’s Information Support GMKA's Development Director Presented the HealUA Mobile App at the EAN Congress 2025 Colorectal Cancer Screening in Ukraine: Factors That Influence It, GMKA Study Shows Educational materials for military surgeons: GMKA begins fundraising for the translation of the Deployed Medicine guidelines GMKA Study on ERAS Adoption for Colorectal Procedures in Ukraine Published in the World Journal of Surgery Ukrainian surgeons received training in Romania with the support of GMKA The GMKA Team's Research on Medical Evacuation of Ukrainian Cancer Patients Was Published in JCO Global Oncology “Women in Medicine: The Voice of Change” Forum — Highlighting GMKA’s Key Initiative for Women’s Leadership ERC's BLS Resuscitation Course for Doctors Supported by GMKA Ukrainian Physicians Completed GMKA Quality and Safety Virtual Course Dr. Ulana Suprun Joins the Advisory Board of the Global Medical Knowledge Alliance Executive Director of GMKA Ukraine spoke at the Annual Meeting of the European Pancreatic Club Top Participant of GMKA’s 'Principles of Surgery' Course Completed Observership at Brigham and Women’s Hospital Gender Disparity in Surgery in Ukraine: A Nationwide Survey The GMKA Team Participated in Kyiv's Race for the Cure® to Support Women with Breast Cancer The founder of GMKA held a meeting with the Minister of Health of Ukraine

National Forum with International Participation “Women in Medicine: The Voice of Change”First National Forum "Women in Medicine: Professional Growth and Leadership"National Forum with International Participation 'Quality & Safety in Healthcare'Kyiv Summer Stroke Summit: Stroke Update 2026 AACR on Campus Poland/Ukraine 2026