Prevalence and risk factors of Human Papillomavirus (HPV) infection in southern Chinese women - a population-based study. oleh Stephanie Si Liu, Kelvin Yuen Kwong Chan, Rebecca Ching Yu Leung, Karen Kar Loen Chan, Kar Fai Tam, May Hiu Mei Luk, Sue Seen Tsing Lo, Daniel Yee Tak Fong, Annie Nga Yin Cheung, Zhong Qiu Lin, Hextan Yuen Sheung Ngan