1. Departments of Pediatrics and Emergency Medicine, Vanderbilt University School of Medicine, Nashville, TN, USA;
2. Center for Asthma Research, Vanderbilt University School of Medicine, Nashville, TN, USA;
3. Tennessee Poison Center, Nashville, TN, USA;
4. Department of Pharmacy, Vanderbilt University Medical Center, Nashville, TN, USA;
5. Celgene Corporation, Summit, NJ, USA;
6. Department of Medicine, Vanderbilt University School of Medicine, Nashville, TN, USA;
7. Departments of Medicine and Emergency Medicine, Vanderbilt University School of Medicine, Nashville, TN, USA