1. Yangpu Hospital, School of Medicine, Tongji University Department of Orthopaedic Surgery, , 450 Tengyue Road, Shanghai 200090, China
2. National University Hospital, National University Health System Department of Orthopaedic Surgery, , 5 Lower Kent Ridge Road, Singapore, 119074, Singapore
3. National University of Singapore Department of Orthopaedic Surgery, Yong Loo Lin School of Medicine, , Singapore, Singapore