p16ink4a expression decreases during imiquimod treatment of anal intraepithelial neoplasia in human immunodeficiency virus-infected men and correlates with the decline of lesional high-risk human papillomavirus DNA load. - Kreuter, A.; Wieland, U.; Gambichler, T.; Altmeyer, P.; Pfister, H.; Tenner-Racz, K.; Racz, P.; Potthoff, A.; Brockmeyer, N.H. (British Journal of Dermatology, 2007)