1. Department of Psychiatry, Faculty of Medicine, Universiti Kebangsaan Malaysia, Medical Centre, 56000 Cheras, Kuala Lumpur, Malaysia
2. Department of Psychiatry, Universiti Putra Malaysia, Serdang, Selangor, Malaysia
3. Department of Physiology, Universiti Kebangsaan Malaysia Medical Centre, 56000 Cheras, Kuala Lumpur, Malaysia
4. Department of Anatomy, Universiti Kebangsaan Malaysia Medical Centre, 56000 Cheras, Kuala Lumpur, Malaysia
5. School of Medicine, Medical University of Galway, Galway, Ireland
6. Department of Psychiatry, Columbia University Medical Center, 262 Central Park West, Suite # 1B, New York, NY 10024, United States