1. Institute for Medical Research, Ministry of Health, Kuala Lumpur, Malaysia
2. International Islamic University Malaysia, Kuantan, Malaysia
3. Institute of Public Health, Ministry of Health, Kuala Lumpur, Malaysia
4. Universiti Sains Islam Malaysia, Kuala Lumpur, Malaysia
5. Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia
6. Klinik Kesihatan Bandar Botanik, Klang, Malaysia
7. University of Malaya, Kuala Lumpur, Malaysia