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.
Kam AC, Li LK, Yeung KN, Wu W, Huang Z, Wu H, Tong MC.Kam AC, et al. Among authors: tong mc.J Med Screen. 2014 Jun;21(2):71-5. doi: 10.1177/0969141314528322. Epub 2014 Mar 12.J Med Screen. 2014.PMID: 24622246
Tong MC, Gao H, Yu JK, Wong TK, Sung JK, van Hasselt CA.Tong MC, et al.Zhonghua Er Bi Yan Hou Tou Jing Wai Ke Za Zhi. 2009 Oct;44(10):843-7.Zhonghua Er Bi Yan Hou Tou Jing Wai Ke Za Zhi. 2009.PMID: 20079055Chinese.