1. Department of Surgery Queen Elizabeth Hospital, Ministry of Health Malaysia Kota Kinabalu Sabah Malaysia
2. Department of Surgery, Faculty of Medicine and Health Sciences Universiti Malaysia Sabah Kota Kinabalu Sabah Malaysia
3. Department of Pathobiology and Medical Diagnostic, Faculty of Medicine and Health Sciences Universiti Malaysia Sabah Kota Kinabalu Sabah Malaysia
4. Department of Surgery, School of Medical Sciences Universiti Sains Malaysia Kubang Kerian Kelantan Malaysia