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.
Heap RB, Galil AK, Harrison FA, Jenkin G, Perry JS.Heap RB, et al. Among authors: perry js.Ciba Found Symp. 1977;(47):127-57. doi: 10.1002/9780470720295.ch7.Ciba Found Symp. 1977.PMID: 246390
Wooding FB, Chambers SG, Perry JS, George M, Heap RB.Wooding FB, et al. Among authors: perry js.Anat Embryol (Berl). 1980;158(3):361-70. doi: 10.1007/BF00301823.Anat Embryol (Berl). 1980.PMID: 7356185