1. Department of Anatomy, School of medicine, Pusan National University, Yangsan, Republic of Korea
2. Department of Statistics, Korea University, Seoul 02841, Republic of Korea
3. Department of Nuclear Medicine, Pusan National University Hospital, Busan, Republic of Korea
4. Eco-friendly new materials research center, Korea Research Institute of Chemical Technology (KRICT), Daejeon, Republic of Korea
5. Department of Orthopaedic Surgery, Pusan National University Hospital, Yangsan, Republic of Korea
6. Department of Internal Medicine, Pusan National University Hospital, Busan, Republic of Korea
7. Department of General Surgery, Pusan National University Hospital, Busan, Republic of Korea