1. Assistant Professor, Inje University, Ilsan Paik Hospital. 2. B.S., M.D., M.S., Ph.D. in Orthopaedics, Yonsei University College of Medicine. 3. Training: internship and resident course, Severance Hospital, Yonsei University, Seoul, Korea. Professional Experience: arthroscopy clinical fellowship, military service as an Army Surgeon Director, shoulder clinical fellowship, clinical professor. 4. 22 numerous papers, mostly about shoulders. 5. Member, Korean Medical Society; Member, Korean Orthopedic Association; Member, Korean Shoulder and Elbow Association; Member, Korean Knee Association Member, Korean Arthroscopic Society; Member, Korean Sports Medicine Society; Member, Korean Fracture Association.