Kwangdong Hospital

B.S., M.S., and Ph.D. in Internal Medicine, Seoul National University College of Medicine Former Director, Seoul National University Hospital (SNUH) Healthcare System Gangnam Center Tenured Professor, Department of Internal Medicine, Seoul National University College of Medicine Tenured Professor, Division of Allergy and Clinical Immunology, SNUH Former Post-Doctoral Researcher, University of Southampton Faculty of Medicine, UK Regular Member, World Allergy Organization (WAO) Designated as "Master Doctor" by the World Allergy Organization Former Chairman, Precision Medicine Committee, WAO Former Chairman, Healthcare Delivery System and Allergy Committee, WAO Editorial Board Member, WAO Journal Former Chairman of the Board, Korean Academy of Asthma, Allergy and Clinical Immunology (KAAACI) Founder, Planning Committee Member, and Current Board Member, Korea Asthma Allergy Foundation Former Director, SNU Allergy and Clinical Immunology Research Institute Former Director, SNUH Adverse Drug Reaction Management Center Former Principal Investigator, Adult Sector, Allergic Disease Standardization Project Former Principal Investigator for Asthma Guidelines, Clinical Research Center for COPD (Ministry of Health and Welfare) Regular Member, National Academy of Medicine of Korea (NAKM) Principal Investigator, Elderly Asthma Cohort Advisory Committee Member, National Health Insurance Service (NHIS) Board Member, Fine Dust Center

B.S., M.S., and Ph.D. in Medicine, Korea University Master of Public Health (MPH), Johns Hopkins University, USA Professor of Gastroenterology, Ilsan CHA Hospital Head of Geriatric Center, Bundang CHA Hospital Director, Chaum Life Center Professor of Gastroenterology, Korea University Medical Center Professor of Gastroenterology, Samsung Medical Center Minister of Health and Welfare Commendation (For Cardiopulmonary Resuscitation) Visiting Professor, Johns Hopkins University School of Medicine, USA Researcher in Gastroenterology, Harvard Medical School, USA Visiting Professor, International Healthcare Center, Korea University Medical Center Global Cooperative Doctor, KOICA (Korea International Cooperation Agency) in Mongolia

Graduated from Dong-A University College of Medicine Completed Internship, Ulsan University Hospital Completed Residency, Dong-A University Hospital Board-Certified Radiologist Regular Member, Korean Society of Radiology Head of Radiology, Korea Association of Health Promotion (KAHP) Seoul Gangnam Branch Head of Radiology, KMI (Korea Medical Institute) Gangnam Center

Graduated from Soonchunhyang University College of Medicine Intern and Internal Medicine Resident, Soonchunhyang University Seoul Hospital Board-Certified in Internal Medicine Subspecialty Board-Certified in Gastrointestinal Endoscopy Lifetime Member, Korean Association of Internal Medicine Lifetime Member, Korean Society of Gastrointestinal Endoscopy Regular Member, Korean Society of Clinical Ultrasound Member, Korean Endocrine Society

Graduated from Ewha Womans University College of Medicine Intern, Gangnam Severance Hospital (Yonsei University College of Medicine) Internal Medicine Resident, Catholic Medical Center Board-Certified in Internal Medicine USMLE Certificate (United States Medical Licensing Examination) Lifetime Member, Korean Association of Internal Medicine Regular Member, Korean Society for Nutritional Therapy Member, Korean Society for Intravenous Therapy

Board-Certified in Family Medicine Completed Family Medicine Residency, Asan Medical Center (Seoul) Head of Endoscopy Department, Gastroenterology Center, KMI (Korea Medical Institute) Head of Endoscopy Department, Gastroenterology Center, Korea Association of Health Promotion (KAHP) Certified Supervising Specialist for Endoscopy, Korean Academy of Family Medicine Lifetime Member, Korean Society of Clinical Ultrasound Regular Member, Korean Society of Gastrointestinal Endoscopy

Graduated from Yonsei University College of Dentistry (D.D.S.) Graduated from Yonsei University Graduate School of Dentistry Former Director, Sae-Yonsei Dental Clinic Former Director, Health Promotion Center at Bundang Jesaeng Hospital