Non-optimal apparent temperatures can increase the risk of acne: a multi-center time-series study - Hao Liu; Chunyan Yao; Chunlei Tan; Kexue Wang; Yumeng Zhou; Xiaoling Liu; Chunbei Zhou; Dawei Li; Yinan Zhao; Jinyun Long; Xiukuan Li; Guiyuan Xiong; et al. (International Journal of Biometeorology, 2026)