1. School of Dentistry; Tri-Service General Hospital and National Defense Medical Center; Taipei Taiwan
2. Department of Orthopaedics; School of Medicine; College of Medicine; Taipei Medical University; Taipei Taiwan
3. Department of Orthopaedics; Shuang Ho Hospital; Taipei Medical University; New Taipei City Taiwan
4. Department of Long Term Care; Chung Hwa University of Medical Technology; Tainan Taiwan
5. Division of Periodontics; Department of Dentistry; Chi Mei Medical Center; Liouying Tainan Taiwan
6. School of Public Health; National Defense Medical Center; Taipei Taiwan