1. Department of Community Medicine, International Medical University (IMU), No. 126, Jalan Jalil Perkasa 19, Bukit Jalil, 57000 Kuala Lumpur, Malaysia
2. International Medical School, Management and Science University (MSU), University Drive, Off Persiaran Olahraga, Section 13, Shah Alam, 40100 Selangor, Malaysia
3. Medical Department, Tengku Ampuan Rahimah Hospital (HTAR), Jalan Langat, Klang, 41200 Selangor, Malaysia
4. Perdana University Graduate School of Medicine, Perdana University, Maeps Building, Mardi Complex, Serdang, 43400 Selangor, Malaysia