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.
Brun A, Western A, Malik Z, Sandberg S.Brun A, et al.Photochem Photobiol. 1990 May;51(5):573-7. doi: 10.1111/j.1751-1097.1990.tb01967.x.Photochem Photobiol. 1990.PMID: 2367554
Brun A, Sandberg S.Brun A, et al.J Photochem Photobiol B. 1988 Jul;2(1):33-41. doi: 10.1016/1011-1344(88)85035-8.J Photochem Photobiol B. 1988.PMID: 3149300
Brun A, Sandberg S.Brun A, et al.J Photochem Photobiol B. 1991 Sep;10(4):285-302. doi: 10.1016/1011-1344(91)80015-a.J Photochem Photobiol B. 1991.PMID: 1791486Review.