Accepted for Publication: November 7, 2013.
Published Online: April 21, 2014. doi:10.1001/jamapediatrics.2013.4984.
Study concept and design: Castellaneta, Francavilla.
Acquisition, analysis, or interpretation of data: All authors.
Drafting of the manuscript: Cristofori, Magistà, Indrio, Francavilla.
Critical revision of the manuscript for important intellectual content: Fontana, Capriati, Castellaneta, Cavallo, Francavilla.
Statistical analysis: Francavilla.
Obtained funding: Magistà.
Administrative, technical, or material support: Cristofori.
Study supervision: Cristofori, Fontana, Capriati, Indrio, Castellaneta, Cavallo, Francavilla.
Conflict of Interest Disclosures: None reported.
Additional Contributions: We thank Dario Gallo, MD, and Maria Elena Tripaldi, MD, both of whom contributed to the data collection; were from the Interdisciplinary Department of Medicine, University of Bari; and received no financial compensation.