1. From the Department of Anesthesiology and Pain Medicine, Seattle Children’s Hospital, Seattle, Wash.
2. Department of Anesthesiology and Pain Medicine, University of Washington, Seattle, Wash.
3. Department of Urology, Seattle Children’s Hospital, Seattle, Wash.
4. Department of Urology, University of Washington, Seattle, Wash.
5. Seattle Children’s Hospital, Seattle, Wash.
6. Department of Otolaryngology—Head and Neck Surgery, University of Washington, Seattle, Wash.
7. Department of Perioperative Services, Seattle Children’s Hospital, Seattle, Wash.