1. Health Administration Program, Faculty of Business & Management, Universiti Teknologi MARA, Bandar Puncak Alam, Malaysia.
2. Department of Health Care Management & Administration, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan.
3. Department of Preventive Medicine and Community Health, University of Occupational and Environmental Health, Kitakyushu, Japan.
4. Department of Health Sciences, Faculty of Medical Sciences, Kyushu University, Fukuoka, Japan.
5. St. Mary's Research Center, St. Mary's Hospital, Kurume, Japan.
6. Department of Epidemiology and Prevention, Center for Clinical Sciences, National Center for Global Health and Medicine, Shinjuku-ku, Japan.