1. Department of Pharmacy, Faculty of Medicine, University of Malaya, 50603 Kuala Lumpur, Malaysia
2. Clinical Investigation Centre, Faculty of Medicine, 13th Floor Main Tower, University Malaya Medical Centre, 59100 Lembah Pantai Kuala Lumpur, Malaysia
3. Department of Medicine, Faculty of Medicine, University of Malaya, 50603 Kuala Lumpur, Malaysia