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.
Pérez A, Wägner AM, Carreras G, Giménez G, Sánchez-Quesada JL, Rigla M, Gómez-Gerique JA, Pou JM, de Leiva A.Pérez A, et al.Arch Intern Med. 2000 Oct 9;160(18):2756-62. doi: 10.1001/archinte.160.18.2756.Arch Intern Med. 2000.PMID: 11025785