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.
Katz N, Rocha RS, Chaves A.Katz N, et al.Bull World Health Organ. 1979;57(5):781-5.Bull World Health Organ. 1979.PMID: 396054Free PMC article.Clinical Trial.
Machado JA, Silva EN, Katz N, Rocha RS, Gazzinelli G.Machado JA, et al. Among authors: katz n.Trans R Soc Trop Med Hyg. 1978;72(4):441. doi: 10.1016/0035-9203(78)90147-5.Trans R Soc Trop Med Hyg. 1978.PMID: 705850No abstract available.
Katz N, Oliveira VB, Rocha RS.Katz N, et al.Rev Inst Med Trop Sao Paulo. 1978 Jul-Aug;20(4):227.Rev Inst Med Trop Sao Paulo. 1978.PMID: 725426No abstract available.
Coura Filho P, Rocha RS, de Lima E Costa MF, Katz N.Coura Filho P, et al. Among authors: katz n.Rev Inst Med Trop Sao Paulo. 1992 Nov-Dec;34(6):543-8. doi: 10.1590/s0036-46651992000600008.Rev Inst Med Trop Sao Paulo. 1992.PMID: 1342123