Doctor of Medicine, 1983. Doctor of Philosophy, Korea University, Seoul, 1992.
Medical staff fellow National Institute Child Health and Human Development, Bethesda, Maryland, 1990-1994. Associate professor Ajou University School Medicine, Suwon, Korea, since 1994. Invited professor Korean Advanced Institute of Science and Technology, Taejon, Korea, 1995-1996.
Fellow American College Medical Genetics.
Married Eun-Jeung Yoon, September 28, 1986. Children: Jae-Hyun, Dong-Yun.