1. Faculty of Pharmacy, Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia;
2. Department of Surgery, Universiti Kebangsaan Malaysia Medical Centre, Kuala Lumpur, Malaysia;
3. Department of Radiotherapy and Oncology, Hospital Kuala Lumpur, Kuala Lumpur, Malaysia;
4. Department of Radiotherapy and Oncology, National Cancer Institute, Putrajaya, Malaysia