Convenient prediction of TcPO2 level using machine learning techniques with the PPG signal's characteristic features. - Xiaoyu Zhang; Yang Xu; Yunlong Li; Jiangyi Shan; Tianjiao Hu; Lisheng Gao; Yining Sun; Mingwei Chen; Xiaotong Zhao; Zuchang Ma (Biomed. Signal Process. Control., 2023)