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.
Kramer MS, Platt R, Yang H, Joseph KS, Wen SW, Morin L, Usher RH.Kramer MS, et al. Among authors: yang h.JAMA. 1998 Dec 2;280(21):1849-54. doi: 10.1001/jama.280.21.1849.JAMA. 1998.PMID: 9846780
Platt RW, Hanley JA, Yang H.Platt RW, et al. Among authors: yang h.Stat Med. 2000 Feb 15;19(3):313-22. doi: 10.1002/(sici)1097-0258(20000215)19:3<313::aid-sim370>3.0.co;2-k.Stat Med. 2000.PMID: 10649298