1. Division of Sports Medicine, Department of Orthopaedic Surgery, Chang-Gung Memorial Hospital, 6 West, Chia-Pu Road, Puzih City, Chiayi 613, Taiwan.
2. Graduate institute of Clinical Medical Sciences, Chang-Gung University, 6 West, Chia-Pu Road, Puzi City, Chiayi 613, Taiwan.
3. Department of Orthopaedic Surgery, Chang-Gung Memorial Hospital, No 5, Fu-Hsing Street, Kwei-Shan, Taoyuan 330, Taiwan.
4. Department of Microbiology, Immunology and Pharmaceuticals, National Chia Yi, No 300, Syuefu Road, Chia-Yi City 600, Taiwan.