Accepted for Publication: March 27, 2013.
Published Online: September 30, 2013. doi:10.1001/jamapediatrics.2013.2581.
Study concept and design: Sengupta, Carrion, Singhal, Lakshminrusimha.
Acquisition of data: Sengupta, Shelton.
Analysis and interpretation of data: Sengupta, Carrion, Ryan, Lakshminrusimha.
Drafting of the manuscript: Sengupta, Lakshminrusimha.
Critical revision of the manuscript for important intellectual content: All authors.
Statistical analysis: Sengupta, Shelton.
Obtained funding: Sengupta, Ryan.
Administrative, technical, and material support: Wynn, Ryan, Singhal, Lakshminrusimha.
Study supervision: Sengupta.
Conflict of Interest Disclosures: None reported.
Funding/Support: This study was supported by intramural funds from the Division of Neonatology, University at Buffalo, and by an American Academy of Pediatrics Resident Research Grant and the Thomas F. Frawley, MD, Residency Research Fellowship Fund, University at Buffalo (Dr Sengupta).
Role of the Sponsor: No funder had a role in the design and conduct of the study; collection, management, analysis, and interpretation of the data; and preparation, review, or approval of the manuscript; and decision to submit the manuscript for publication.
Additional Contributions: Priya K. Singhal, BA, and Alyssa S. Hermann, BA, helped extract the data. Ms Hermann was compensated on an hourly rate for the same.
Correction: This article was corrected on December 9, 2013, for errors in Tables 1 and 4 and for an error in the text.