Trait-like nocturnal sleep behavior identified by combining wearable, phone-use, and self-report data. - Stijn A. A. Massar; Xin Yu Chua; Chun Siong Soon; Alyssa S. C. Ng; Ju Lynn Ong; Nicholas I. Y. N. Chee; Tih Shih Lee; Arko Ghosh; Michael W. L. Chee (npj Digit. Medicine, 2021)