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.
Muller AS, Leeuwenburg J, Voorhoeve AM.Muller AS, et al. Among authors: leeuwenburg j.Bull World Health Organ. 1984;62(6):899-908.Bull World Health Organ. 1984.PMID: 6335848Free PMC article.Clinical Trial.
Muller AS, Leeuwenburg J, Pratt DS.Muller AS, et al. Among authors: leeuwenburg j.Bull World Health Organ. 1986;64(2):321-31.Bull World Health Organ. 1986.PMID: 3488848Free PMC article.
Kok PW, Leeuwenburg J, Tukei P, van Wezel AL, Kapsenberg JG, van Steenis G, Galazka A, Robertson SE, Robinson D.Kok PW, et al. Among authors: leeuwenburg j.Bull World Health Organ. 1992;70(1):93-103.Bull World Health Organ. 1992.PMID: 1568283Free PMC article.