Patterns of sex behaviors and factors associated with condomless anal intercourse during the COVID-19 pandemic among men who have sex with men in Hong Kong: A cross-sectional study. - Mo, Phoenix K. H.; Xin, Meiqi; Wang, Zixin; Lau, Joseph T. F.; Ye, Xinchen; Hui, Kam Hei; Yu, Fuk Yuen; Lee, Ho Hin (PLoS ONE, 2024)