1. Foot and Ankle Service, KT Lee’s Orthopedic Hospital, Seoul, Korea
2. Department of Orthopedic Surgery, Ajou University Hospital, Ajou University School of Medicine, Suwon, Gyeonggi-do, Korea
3. Foot and Ankle Clinic, Department of Orthopedic Surgery, Eulji Medical Center, Eulji University School of Medicine, Seoul, Korea