1. Ramathibodi Poison Center, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok, Thailand;
2. Division of Clinical Pharmacology and Toxicology, Department of Medicine, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok, Thailand;
3. National Health Security Office (NHSO), Bangkok, Thailand;
4. Queen Saovabha Memorial Institute, Thai Red Cross Society, Bangkok, Thailand