Revealing the complexity of depression configurations in HIV-positive men who have sex with men: a fuzzy-set qualitative comparative analysis. - Mei, Songli; Zheng, Chengbin; Liang, Leilei; Zhang, Jian; Kiyum, Marhaba; Fei, Junsong; Yuan, Tongshuang; Wang, Huimin; Gao, Jiaying; Liu, Xiaoying; Du, Na (BMC Public Health, 2025)