1. Department of Psychiatry, Hospital Segamat, Kuala Lumpur, Malaysia
2. Department of Psychiatry, Hospital Bintulu, Kuala Lumpur, Malaysia
3. Department of Psychiatry, Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia
4. Hospital Canselor Tuanku Muhriz, Jalan Yaacob Latif, Bandar Tun Razak, Kuala Lumpur, Malaysia
5. Department of Community Health, Faculty of Medicine, Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia