Knotted or knotless? Efficacy analysis of the percutaneous Achilles repair system (PARS) for acute Achilles tendon ruptures: a retrospective cohort study. - Su, Hai; Xu, Taotao; Sun, Yan; Wu, Li; Fu, Kemo; Zhang, Chuanxin; Zhu, Yunli; Liu, Fucun (Journal of Orthopaedic Surgery & Research, 2025)