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.
Nicholls J, Sham J, Ng MH, Choy D.Nicholls J, et al. Among authors: choy d.Pathol Res Pract. 1993 Nov;189(9):1067-70. doi: 10.1016/S0344-0338(11)80682-5.Pathol Res Pract. 1993.PMID: 8302726
Wei WI, Sham JS, Zong YS, Choy D, Ng MH.Wei WI, et al. Among authors: choy d.Cancer. 1991 Jun 15;67(12):3127-30. doi: 10.1002/1097-0142(19910615)67:12<3127::aid-cncr2820671231>3.0.co;2-r.Cancer. 1991.PMID: 1646070
Sham JS, Wei WI, Nicholls J, Chan CW, Choy D.Sham JS, et al. Among authors: choy d.Cancer. 1992 Feb 15;69(4):854-9. doi: 10.1002/1097-0142(19920215)69:4<854::aid-cncr2820690403>3.0.co;2-q.Cancer. 1992.PMID: 1735076
Sham JS, Chan LC, Loke SL, Choy D.Sham JS, et al. Among authors: choy d.Oncology. 1991;48(6):480-2. doi: 10.1159/000226985.Oncology. 1991.PMID: 1749586
Sham JS, Choy D.Sham JS, et al. Among authors: choy d.Australas Radiol. 1991 Nov;35(4):370-3. doi: 10.1111/j.1440-1673.1991.tb03050.x.Australas Radiol. 1991.PMID: 1812832