Ct-based diagnosis of sarcopenia as a prognostic factor for postoperative mortality after elective open-heart surgery in older patients: a cohort-based systematic review and meta-a... oleh Tao-Ran Yang, Tao-Ran Yang, Peng Ji, Xiao Deng, Xiao Deng, Xi-Xia Feng, Xi-Xia Feng, Meng-Lin He, Meng-Lin He, Ru-Rong Wang, Ru-Rong Wang, Ru-Rong Wang, Xue-Han Li, Xue-Han Li