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Rosenberg L, Kelly JP, Shapiro S, Hoffman M, Cooper D.Rosenberg L, et al. Among authors: hoffman m.S Afr Med J. 2002 Jun;92(6):447-8.S Afr Med J. 2002.PMID: 12146129No abstract available.
Shapiro S, Rosenberg L, Hoffman M, Kelly JP, Cooper DD, Carrara H, Denny LE, du Toit G, Allan BR, Stander IA, Williamson AL.Shapiro S, et al. Among authors: hoffman m.Cancer Causes Control. 2003 Jun;14(5):485-95. doi: 10.1023/a:1024910808307.Cancer Causes Control. 2003.PMID: 12946044
Cooper D, Hoffman M, Carrara H, Rosenberg L, Kelly J, Stander I, Denny L, Williamson AL, Shapiro S.Cooper D, et al. Among authors: hoffman m.BMC Public Health. 2007 Nov 27;7:341. doi: 10.1186/1471-2458-7-341.BMC Public Health. 2007.PMID: 18042284Free PMC article.
Allan BR, Marais DJ, Denny L, Hoffman M, Shapiro S, Williamson AL.Allan BR, et al. Among authors: hoffman m.S Afr Med J. 2006 Nov;96(11):1186-90.S Afr Med J. 2006.PMID: 17167705