[1] Hanyang Univ, Coll Med, Orthoped Surg, Seoul, South Korea
[2] Ajou Univ, Sch Med, Orthoped Surg, Suwon, South Korea
[3] Ajou Univ, Coll Med, Endocrinol & Metab, Suwon, South Korea
[4] Catholic Univ, Int St Marys Hosp, Endocrinol & Metab, Incheon, South Korea
[5] Seoul Natl Univ, Coll Med, Obstet & Gynecol, Seoul, South Korea
[6] Yonsei Univ, Coll Med, Endocrinol & Metab, Seoul, South Korea
[7] Hanyang Univ, Coll Med, Endocrinol & Metab, Seoul, South Korea
[8] Hlth Insurance Review & Assessment Serv, Seoul, South Korea
[9] Konyang Univ, Coll Med, Orthoped Surg, Seoul, South Korea