Self-reported physical activity and risk of primary knee replacement for osteoarthritis: a competing risks cohort analysis. - Peng, Hao; Cai, Qianying; Liu, Dongning; Duong, Vicky; Oo, Win Min; Zhang, Changqing; Hunter, David J.; Zheng, Yongqiang; Fu, Kai (BMC Musculoskeletal Disorders, 2025)