Major Professional Experiences (Residency, Internship)
- Professor, Pediatrics at CHA Bundang Medical Center, CHA University, Gyeonggi-Do, Korea
- Professor, Pediatrics at University of Ulsan College of Medicine
- Professor, Pediatric Endocrinology at Asan Medical Center Children's Hospital in Seoul
- Director of Asan Medical Center Children's Hospital in Seoul(2009.03~2013.02)