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.
Shao XX, Duncan NA, Lin L, Fu X, Zhang JY, Yu CL.Shao XX, et al. Among authors: duncan na.Chin Med J (Engl). 2013 Jul;126(13):2523-9.Chin Med J (Engl). 2013.PMID: 23823828
Villemure I, Chung MA, Seck CS, Kimm MH, Matyas JR, Duncan NA.Villemure I, et al. Among authors: duncan na.Stud Health Technol Inform. 2002;91:114-8.Stud Health Technol Inform. 2002.PMID: 15457706