Clinical prediction models of fractional flow reserve: an exploration of the current evidence and appraisal of model performance - Zuo, Wenjie; Zhang, Rui; Yang, Mingming; Ji, Zhenjun; He, Yanru; Su, Yamin; Qu, Yangyang; Tao, Zaixiao; Ma, Genshan (Quantitative Imaging in Medicine and Surgery, 2021)