Changes in High-Risk HPV Infection Prevalence and Associated Factors in Selected Rural Areas of China: A Multicenter Population-Based Study oleh Yan-Qin Yu, Yan-Qin Yu, Ming-Yue Jiang, Le Dang, Rui-Mei Feng, Mohamed S. Bangura, Mohamed S. Bangura, Wen Chen, You-Lin Qiao, You-Lin Qiao