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.
Amartey JK, Wolf W.Amartey JK, et al.Int J Rad Appl Instrum B. 1991;18(7):797-802. doi: 10.1016/0883-2897(91)90020-l.Int J Rad Appl Instrum B. 1991.PMID: 1787090
Somawardhana CW, Sajjad M, Amartey JK, Lambrecht RM.Somawardhana CW, et al. Among authors: amartey jk.Int J Rad Appl Instrum A. 1991;42(3):215-20. doi: 10.1016/0883-2889(91)90079-g.Int J Rad Appl Instrum A. 1991.PMID: 1647381