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.
Chong JL, Low LL, Chan DYL, Shen Y, Thin TN, Ong MEH, Matchar DB.Chong JL, et al.Singapore Med J. 2019 Sep;60(9):446-453. doi: 10.11622/smedj.2019012. Epub 2019 Jan 15.Singapore Med J. 2019.PMID: 30644525Free PMC article.
Chong JL, Matchar DB, Tan Y, Sri Kumaran S, Gandhi M, Ong MEH, Wong KS.Chong JL, et al.J Gen Intern Med. 2021 Jan;36(1):9-16. doi: 10.1007/s11606-020-05962-4. Epub 2020 Jun 30.J Gen Intern Med. 2021.PMID: 32607929Free PMC article.