Citation:Schiffman M, Kjaer SK 2003
From National Cancer Control Policy
Schiffman M, Kjaer SK. Chapter 2: Natural history of anogenital human papillomavirus infection and neoplasia. J Natl Cancer Inst Monogr 2003;(31):14-9 Available from: http://www.ncbi.nlm.nih.gov/pubmed/12807940.
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