The following are HPV (human papilloma virus) cancer references:
Acharya, A., et al. Chemopreventive Properties of Indole-3-Carbinol, Diindolylmethane and Other Constitents of Cardamom Against Carcinogenesis. Recent Pat Food Nutr Agric. 2010 Jun;2(2):166-77. Georgetown University Medical Center, Washington, DC, USA. (PMID: 20653562.)
Butler, LM., et al. Green and Black Tea in Relation to Gynecologic Cancers. Mol Nutr Food Res. 2011 May 19. (Epub ahead of print.) Colorado State University, Fort Collins, CO, USA. (PMID: 21595018.)
Efferth, T, Willmar Schwabe Award 2006: Antiplasmodial and Antitumor Activity of Artemisinin-From Bench to Bedside. Planta Med. 2007 Apr;73(4):299-309. German Cancer Research Center, Heidelberg, Germany. (Summary 207. PMID: 17354163.)
NOTE: Read about HPV as a risk factor for oral and esophageal tumors.