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.
Ward JI, Siber GR, Scheifele DW, Smith DH.Ward JI, et al.J Pediatr. 1978 Jul;93(1):37-42. doi: 10.1016/s0022-3476(78)80596-4.J Pediatr. 1978.PMID: 306427
Ward JI, Margolis HS, Lum MK, Fraser DW, Bender TR, Anderson P.Ward JI, et al.Lancet. 1981 Jun 13;1(8233):1281-5. doi: 10.1016/s0140-6736(81)92458-2.Lancet. 1981.PMID: 6112604