Penile cancer: Difference between revisions
WikiModEn2 (talk | contribs) →Infection with human papilloma virus: Improve citation. |
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}}</ref> Poland identified human papilloma virus (HPV) types 16 and 18 as the cause of penile and cervical cancers in 1990, and that they could be spread by sexual contact.<ref name="poland1990">{{REFjournal | }}</ref> [[Ronald L. Poland| Poland]] identified human papilloma virus (HPV) types 16 and 18 as the cause of penile and cervical cancers in 1990, and that they could be spread by sexual contact.<ref name="poland1990">{{REFjournal | ||
|last=Poland | |last=Poland | ||
|init=RL | |init=RL | ||