Accepted for Publication: May 27, 2014.
Published Online: August 4, 2014. doi:10.1001/jamapediatrics.2014.1148.
Study concept and design: All authors.
Acquisition, analysis, or interpretation of data: Sakhuja, Shah.
Drafting of the manuscript: More, Sakhuja.
Critical revision of the manuscript for important intellectual content: Sakhuja, Shah.
Statistical analysis: More, Shah.
Study supervision: Shah.
Conflict of Interest Disclosures: None reported.
Funding/Support: Dr Shah is the recipient of an Applied Research Chair Award in Reproductive and Child Health Services and Policy Research from the Canadian Institutes of Health Research to conduct research projects involving maternal and child health.
Role of the Sponsor: The funding source had no role in the design and conduct of the study; collection, management, analysis, and interpretation of the data; preparation, review, or approval of the manuscript; and decision to submit the manuscript for publication.
Additional Information: This study is registered with the PROSPERO International Prospective Register of Systematic Reviews (http://www.crd.york.ac.uk/PROSPERO/). Identifier: CRD42013004455.
Additional Contributions: Wolfgang Göpel, MD, provided additional data for inclusion in this review from his study. Elizabeth Uleryk, BA, MLS, Hospital for Sick Children, helped in conducting searches for this project. Ruth Warre, PhD, from the Maternal-Infant Care Research Centre, Mount Sinai Hospital, provided editorial support. The Maternal-Infant Care Research Centre is supported by the Ministry of Health and Long-term Care, Ontario, Canada.