Important advances in sleep research in 2021.

Competing Interests: CAK reports personal fees related to consultancies or participation in medical advisory boards from XW Pharma, Idorsia, Merck, Jazz Pharmaceuticals, Avadel Pharmaceuticals, Cerebra, and VIVOS; grants or contracts with the National Institutes of Health, Avadel Pharmaceuticals, AmCad BioMed Corporation, Jazz Pharmaceuticals, Merck Sharp & Dohme, Parexel International Corporation, Asate, Inspire Medical Systems, and Respironics; lecture honoraria from ResMed Asia and Itamar Medical; and stock or stock options from M3 Public Benefit Corporation, Restful Robotics, VIVOS, and Koko. LCW declares no competing interests.