Accepted for Publication: January 8, 2014.
Published Online: March 17, 2014. doi:10.1001/jamapediatrics.2014.58.
Study concept and design: Jiang, Li, Wen, He, Dibley, Qian.
Acquisition, analysis, or interpretation of data: Jiang, Li, Wen, Hu, Yang, Baur, Qian.
Drafting of the manuscript: Jiang, Li, Wen, Baur, Qian.
Critical revision of the manuscript for important intellectual content: All authors.
Conflict of Interest Disclosures: None reported.
Funding/Support: This study was funded by a Small Research Grant from the Nestle Foundation and by grant 12GWZX0301 from the Shanghai Municipal Health Bureau.
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 Contributions: We thank the Longhua, Caohejing, Meilong, and Xinzhuang community health centers in Shanghai, China, for their support, and we thank all the participants for their collaboration.