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.
Coupland SE, Perez-Canto A, Hummel M, Stein H, Heimann H.Coupland SE, et al. Among authors: heimann h.Graefes Arch Clin Exp Ophthalmol. 2005 Sep;243(9):847-52. doi: 10.1007/s00417-005-1166-1. Epub 2005 May 21.Graefes Arch Clin Exp Ophthalmol. 2005.PMID: 15909161