1. Tennessee Poison Center, Nashville, TN, USA;
2. Department of Pharmacy, Vanderbilt University Medical Center, Nashville, TN, USA;
3. Division of Emergency Medicine, University of Utah Hospital, Salt Lake City, UT, USA;
4. Oregon Poison Center, Portland, OR, USA;
5. Oregon Health Science University, Portland, OR, USA;
6. Pharmacotherapy, Utah Poison Control Center, Salt Lake City, UT, USA;
7. Department of Pharmacotherapy, University of Utah College of Pharmacy, Salt Lake City, UT, USA