1 National Capital Poison Center, Division of Emergency Medicine, Children's National Medical Center, George Washington University School of Medicine & Health Sciences, Washington, DC, USA.
2 Division of Emergency Medicine, Ann & Robert Lurie Children's Hospital of Chicago, Northwestern University Feinberg School of Medicine, Chicago, IL, USA.
3 National Capital Poison Center, Division of Emergency Medicine, Children's National Medical Center, Department of Emergency Medicine, George Washington University School of Medicine & Health Sciences, Washington, DC, USA.