Sleep Stage Classification During CPAP Therapy from CPAP-Airflow and Wearable Fingertip Signals. - Chen, Hsin-Yu; Husain, Aatif; Zinchuk, Andrey V.; Yaggi, Henry K.; Ahsan, Muneeb; Chen, Cheng-Yao; Pokusa, Shirah; Wu, Hau-Tieng (Sensors (14248220), 2026)