1. Division of Emergency Medicine, Children’s Hospital of Philadelphia, Philadelphia, PA, USA
2. The Poison Control Center at Children's Hospital of Philadelphia, Philadelphia, PA, USA
3. Center for Injury Research and Prevention, Children’s Hospital of Philadelphia, Philadelphia, PA, USA
4. Department of Pharmacy and Therapeutics, University of Pittsburgh, Pittsburgh, PA, USA
5. Pittsburgh Poison Control Center of UPMC, Pittsburgh, PA, USA