1. Department of Occupational Health, Faculty of Medicine and Health Sciences, University Putra Malaysia, Serdang, Selangor, Malaysia
2. Department of Orthopedics, Faculty of Medicine and Health Sciences, University Putra Malaysia, Serdang, Selangor, Malaysia
3. Department of Pathology, Faculty of Medicine and Health Sciences, University Putra Malaysia, Serdang, Selangor, Malaysia