Affiliation: | 1 Department of Emergency Medicine, Bangkok Metropolitan Administration Medical College and Vajira Hospital, Bangkok, Thailand 2 Centers for Disease Control, Atlanta, GA USA 3 Department of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok, Thailand 4 Department of Emergency Medicine, UCSF Medical Center, Fresno, CA USA 5 California Poison Control System, Fresno-Madera Division, Fresno, CA USA |