1. Department of Orthopaedic Surgery and Rare Diseases Institute; Korea University Medical Centre, Guro Hospital; 80 Guro-dong Guro-gu Seoul 152-703 Korea
2. Department of Prosthodontics, College of Dentistry; Younsei University; 134 Sinchon-dong Seodaemun-gu Seoul 120-749 Korea
3. Division of Biological Imaging, Chuncheon Centre; Korea Basic Science Institute; 192-1 Hyoja 2-dong Chuncheon Gangwon-do 200-701 Korea
4. Department of Prosthodontics, School of Dentistry; Pusan National University; Yang San 626-787 Korea