Population-based prevalence and age distribution of human papillomavirus among women in Santiago, Chile. - Ferreccio C; Prado RB; Luzoro AV; Ampuero SL; Snijders PJ; Meijer CJ; Vaccarella SV; Jara AT; Puschel KI; Robles SC; Herrero R; Franceschi SF; et al. (Cancer epidemiology, biomarkers & prevention : a publication of the American Association for Cancer Research, cosponsored by the American Society of Preventive Oncology, 2004)