Submitted for Publication: August 26, 2013; final revision received October 31, 2013; accepted November 25, 2013.
Published Online: February 13, 2014. doi:10.1001/jamaoto.2013.6718.
Study concept and design: Niesten, Lee.
Acquisition of data: Niesten, Curtin, Merchant, Lee.
Analysis and interpretation of data: Niesten, Lookabaugh, Curtin, McKenna, Grolman, Lee.
Drafting of the manuscript: Niesten, Lookabaugh, Merchant, Grolman.
Critical revision of the manuscript for important intellectual content: Niesten, Curtin, McKenna, Grolman, Lee.
Administrative, technical, and material support: Niesten, Lookabaugh, Curtin, Merchant, McKenna, Lee.
Study supervision: Niesten, Curtin, Grolman, Lee.
Conflict of Interest Disclosures: None reported.