1. Centre for Epidemiology and Evidence-Based Practice, Department of Social and Preventive Medicine, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
2. Centre of Clinical Epidemiology, Institute of Clinical Research, National Institutes of Health, Shah Alam, Selangor, Malaysia
3. Department of Radiotherapy and Oncology, Kuala Lumpur Hospital, Kuala Lumpur, Malaysia
4. Department of Surgery, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
5. Department of Clinical Oncology, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
6. Department of Radiotherapy and Oncology, National Cancer Institute, Putrajaya, Malaysia
7. Subang Jaya Medical Centre, Subang Jaya, Malaysia
8. Department of Obstetrics and Gynecology, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia