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.
John E, Fanwick PE, McKenzie AT, Stowell JG, Green MA.John E, et al.Int J Rad Appl Instrum B. 1989;16(8):791-7. doi: 10.1016/0883-2897(89)90163-3.Int J Rad Appl Instrum B. 1989.PMID: 2621114
John E, Wilder S, Thakur ML.John E, et al.Nucl Med Commun. 1994 Jan;15(1):24-8. doi: 10.1097/00006231-199401000-00005.Nucl Med Commun. 1994.PMID: 8152689