An official website of the United States government
The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before
sharing sensitive information, make sure you’re on a federal
government site.
The site is secure.
The https:// ensures that you are connecting to the
official website and that any information you provide is encrypted
and transmitted securely.
Retnakaran R, Wen SW, Tan H, Zhou S, Ye C, Shen M, Smith GN, Walker MC.Retnakaran R, et al. Among authors: wen sw.JAMA Pediatr. 2018 Feb 1;172(2):136-142. doi: 10.1001/jamapediatrics.2017.4016.JAMA Pediatr. 2018.PMID: 29279903Free PMC article.
Liu S, Joseph KS, Kramer MS, Allen AC, Sauve R, Rusen ID, Wen SW; Fetal and Infant Health Study Group of the Canadian Perinatal Surveillance System.Liu S, et al. Among authors: wen sw.JAMA. 2002 Mar 27;287(12):1561-7. doi: 10.1001/jama.287.12.1561.JAMA. 2002.PMID: 11911759