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.
Grassman ED, Leya FS, Lewis BE, Johnson SA, McNulty JA, Sumida CW, McKiernan TL, Killian DM, Halle AA, Ward KA, et al.Grassman ED, et al. Among authors: mcnulty ja.Cathet Cardiovasc Diagn. 1993;Suppl 1:48-53.Cathet Cardiovasc Diagn. 1993.PMID: 8324817
McNulty JA, Cole AA, Fox LM.McNulty JA, et al.Neurosci Lett. 1988 Aug 1;90(3):254-8. doi: 10.1016/0304-3940(88)90198-x.Neurosci Lett. 1988.PMID: 3419637