1. Department of Dermatology, Yansan Pusan National University Hospital, School of Medicine, Pusan National University, Yangsan, Korea.
2. Department of Family Medicine, Yansan Pusan National University Hospital, School of Medicine, Pusan National University, Yangsan, Korea.
3. Department of Orthopaedics, School of Medicine, Dong-a University Medical Center, Busan, Korea.