1. Rocky Mountain Poison and Drug CenterDenver Health Denver CO USA
2. Injury Prevention Research Center and Eshelman School of PharmacyUniversity of North Carolina Chapel Hill NC USA
3. Center for Pharmacoepidemiology Research and Training and Center for Clinical Epidemiology and Biostatistics, Department of Biostatistics and EpidemiologyUniversity of Pennsylvania Perelman School of Medicine Philadelphia PA USA
4. Department of Biostatistics and Computational BiologyUniversity of Rochester Rochester NY USA
5. Department of Emergency MedicineUniversity of Colorado School of Medicine Aurora CO USA