Accepted for Publication: February 2, 2011.
Published Online: May 2, 2011. doi:10.1001/archpediatrics.2011.72
Author Contributions: Drs Shi, Y. Yang, Wang, and Ma contributed equally to this work. Study concept and design: Shi, Y. Yang, Wang, Ma, and Li. Acquisition of data: Shi, Y. Yang, Wang, Ma, Schreiber, Sun, Zhao, X. Yang, Zhang, Lu, Teng, and An. Analysis and interpretation of data: Shi, Y. Yang, Wang, and Ma. Drafting of the manuscript: Shi, Y. Yang, Wang, and Ma. Critical revision of the manuscript for important intellectual content: Schreiber, Li, Sun, Zhao, X. Yang, Zhang, Lu, Teng, and An. Statistical analysis: Shi. Administrative, technical, and material support: Y. Yang, Wang, Ma, Schreiber, Sun, Zhao, X. Yang, Zhang, Lu, Teng, and An. Study supervision: Li.
Financial Disclosure: None reported.
Additional Information: This systematic review was carried out using the recommendations and protocols of the Cochrane Collaboration (Higgins JPT, Green S, eds. Cochrane Handbook for Systematic Reviews of Interventions, Version 5.0.1. Updated September 2008. http://www.cochrane-handbook.org. Accessed August 20, 2010).
Additional Contributions: Allen Nicholson, PhD, Mark Feitelson, PhD, James Bloxton, PhD (all from Temple University), Patricia Dillon, PhD (LaSalle University, Philadelphia), and Joshua Breslau, PhD (Princeton University, Princeton, New Jersey) provided critical review and generous support.