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.
Ziegler K, Sanft C, Friedrich M, Gregor M, Riecken EO.Ziegler K, et al.Endoscopy. 1990 Jan;22(1):1-4. doi: 10.1055/s-2007-1012776.Endoscopy. 1990.PMID: 2407524
Zimmer T, Ziegler K, Liehr RM, Stölzel U, Riecken EO, Wiedenmann B.Zimmer T, et al. Among authors: ziegler k.Ann N Y Acad Sci. 1994 Sep 15;733:425-36. doi: 10.1111/j.1749-6632.1994.tb17292.x.Ann N Y Acad Sci. 1994.PMID: 7978891Review.
Polensky A, Ziegler K, Sanft C, Gregor M, Friedrich M, Stein H, Riecken EO.Polensky A, et al. Among authors: ziegler k.Dtsch Med Wochenschr. 1988 Aug 19;113(33):1263-70. doi: 10.1055/s-2008-1067803.Dtsch Med Wochenschr. 1988.PMID: 3044720German.