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Augmentation of the expression of T antigen by in vitro cultivation of SV40-induced tumors of hamsters suggested that growing human brain tumors in vitro might provide an effective screening technique for the SV40 virus. In a series of human brain tumors examined in cryostat sections and in tissue culture, T antigen could not be demonstrated, suggesting that by this immunofluorescent technique SV40 was not implicated in the etiology of these tumors.<\/jats:p>","DOI":"10.1017\/s0317167100025853","type":"journal-article","created":{"date-parts":[[2016,7,28]],"date-time":"2016-07-28T11:31:46Z","timestamp":1469705506000},"page":"105-109","source":"Crossref","is-referenced-by-count":13,"title":["Studies of Human Papovavirus Tumor Antigen in Experimental and Human Cerebral 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