1. Department of Medicine; Sultanah Aminah Hospital; Johor Bahru Johor Malaysia
2. Department of Psychiatry; International Islamic University; Kuantan Pahang Malaysia
3. Seremban KPJ Specialist Hospital; Seremban Negeri Semibilan Malaysia
4. University of Putra Malaysia; Serdang Malaysia
5. Ampang Puteri Hospital; Kuala Lumpur Malaysia
6. Biostatistics Department; Clinical Research Centre; Kuala Lumpur Malaysia