Copyright 2004 by The Korean Paediatric Orthopaedic Society. All Rights Reserved. Department of Orthopaedic Surgery Yonsei University College of Medicine, 250 Seongsanno(134 Sinchon-dong), Seodaemun-gu, Seoul 120-752, Korea  Phone: +82-2-2228-2180 FAX: +82-2-363-1139