Prevalence and influencing factors of anxiety, depression, and burnout among teachers in China: a cross-sectional study - He, Lulu; Huang, Lingling; Huang, Yuanyuan; Li, Hehua; Zhang, Ziyun; Li, Junhao; Lin, Shisong; Wu, Kai; Huang, Dongchang; Wu, Fengchun (Frontiers in Psychiatry, 2025)