1. Department of Emergency Medicine, University of California Davis Medical Center, Sacramento, CA, USA;
2. Department of Internal Medicine, Divisions of Toxicology, Pulmonary and Critical Care, University of California Davis Medical Center, Sacramento, CA, USA;
3. Department of Internal Medicine, Division of Cardiology, University of California Davis Medical Center, Sacramento, CA, USA;
4. Departments of Medicine and Clinical Pharmacy, University of California, San Francisco, Medical Director, California Poison Control System, San Francisco Division, San Francisco, CA, USA;
5. Department of Emergency Medicine, Drexel University, Philadelphia, PA, USA;
6. Department of Internal Medicine, Division of Cardiology, Texas Tech University Health Sciences Center, El Paso, TX, USA