1. Ramathibodi Poison Center, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
2. Department of Emergency Medicine, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
3. Department of Medicine, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
4. Pathology Department, Hospital Tengku Ampuan Rahimah, Klang, Malaysia
5. Emergency and Trauma Department, Hospital Raja Permaisuri Bainun, Ipoh, Malaysia
6. Emergency Department, Ng Teng Fong General Hospital, Singapore