Multiple HPV infections among men who have sex with men engaged in anal cancer screening in Abuja, Nigeria oleh Rebecca G. Nowak, Lisa M. Schumaker, Nicholas P. Ambulos, Nicaise Ndembi, Wuese Dauda, Chinedu H. Nnaji, Andrew Mitchell, Trevor J. Mathias, Paul Jibrin, Teresa M. Darragh, Oluwole Olaomi, Trevor A. Crowell, Stefan D. Baral, Manhattan E. Charurat, Søren M. Bentzen, Joel M. Palefsky, Kevin J. Cullen, Manhattan Charurat, Julie Ake, Aka Abayomi, Sylvia Adebajo, Stefan Baral, Trevor Crowell, Charlotte Gaydos, Sosthenes Ketende, Afoke Kokogho, Jennifer Malia, Olumide Makanjuola, Nelson Michael, Nicaise Ndemb, Rebecca Nowak, Oluwasolape Olawore, Zahra Parker, Sheila Peel, Habib Ramadhani, Merlin Robb, Cristina Rodriguez-Hart, Eric Sanders-Buell, Elizabeth Shoyemi, Sodsai Tovanabutra, Sandhya Vasan