A novel semi-supervised learning model based on pelvic radiographs for ankylosing spondylitis diagnosis reduces 90% of annotation cost. - Hao Li; Dong Yin; Baichuan Li; Chong Liu; Chunxiang Xiong; Qie Fan; Shuyu Yao; Wenwen Huang; Wenhao Li; Jingda Zhang; Hongmian Li (Comput. Biol. Medicine, 2025)