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.
Sittner L, Grummert S, Potthoff CJ, Lyman ED.Sittner L, et al. Among authors: potthoff cj.Nebr State Med J. 1967 Sep;52(9):412-7.Nebr State Med J. 1967.PMID: 4229338No abstract available.
LYMAN ED, POTTHOFF CJ, JACOBI HP.LYMAN ED, et al. Among authors: potthoff cj.Nebr State Med J. 1957 May;42(5):243-5.Nebr State Med J. 1957.PMID: 13418798No abstract available.