Accepted for Publication: June 21, 2012.
Published Online: December 10, 2012. doi:10.1001/2013.jamapediatrics.107
Author Contributions:Acquisition of data: Shah and Tsung. Analysis and interpretation of data: Shah, Tunik, and Tsung. Drafting of the manuscript: Shah, Tunik, and Tsung. Critical revision of the manuscript for important intellectual content: Shah and Tsung. Statistical analysis: Shah, Tunik, and Tsung. Study supervision: Tunik and Tsung.
Conflict of Interest Disclosures: None reported.
Previous Presentations: This study was presented at the 2010 Society for Academic Emergency Medicine Annual Meeting; June 5, 2010; Phoenix, Arizona; and at the 2010 Pediatric Academic Societies Annual Meeting; May 2, 2010; Vancouver, British Columbia, Canada.
Online-Only Material: This article is featured in the JAMA Pediatrics Journal Club. Go here to download teaching PowerPoint slides.
Additional Contributions: The following sonologists recruited patients and enrolled them into the study: Marc Auerbach, MD; Lili Banan, MD; Sarah Case, MD; Carrie Danziger, MD; Jeffrey Fine, MD; Dennis Heon, MD; David O. Kessler, MD; George Kristinsson, MD; Rachel Kowalsky, MD; Deborah Levine, MD; Adriana Manikian, MD; Michael Mojica, MD; and Ee T. Tay, MD. Raeshem Nijhon, Deepak Penesetti, MD, and Anh Nguyen, MD, MBA, assisted with production of the video.