1. Department of Psychiatry, Faculty of Medicine, University Kebangsaan Malaysia, Jalan Yaacob, Kuala Lumpur 56000, Malaysia
2. Department of Psychiatry, Hospital Tengku Ampuan Rahimah, Jalan Langat, Klang 41200, Malaysia
3. Polytechnic Sultan Salahuddin Abdul Aziz Shah, Persiaran Usahawan, Shah Alam 40150, Malaysia
4. Faculty of Engineering, Tenaga Nasional University, Jalan Ikram-Uniten, Kajang 43000, Malaysia