1. Department of Family Medicine, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, Selangor, Malaysia
2. Department of Nursing, King Fahd Hospital of the University, Imam Abdulrahman Bin Faisal University, Al Khobar, Saudi Arabia
3. Department of Medicine (Nephrology), Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
4. Department of Nursing Science, Faculty of Medicine, University Malaya, Kuala Lumpur, Malaysia