A Signal Segmentation-Free Model for Electrocardiogram-Based Obstructive Sleep Apnea Severity Classification. - Jeng-Wen Chen; Shih-Tsang Lin; Cheng-Yi Wang; Chun-Cheng Lin; Kuan-Chun Hsu; Cheng-Yu Yeh; Shaw-Hwa Hwang (Adv. Intell. Syst., 2023)