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Background External genital warts (EGWs, condylomata acuminata) are a common, highly contagious disease caused by human papillomavirus (HPV), predominantly HPV 6 and HPV 11. Green tea catechins have been identified for their immunostimulatory, antiproliferative and antitumour properties. Two phase III trials evaluated treatment of EGWs with ointment containing a mixture of green tea catechins (Polyphenon...