Opal Actigraphy (Activity and Sleep) Measures Compared to ActiGraph: A Validation Study. - Vrutangkumar V. Shah; Barbara H. Brumbach; Sean Pearson; Paul Vasilyev; Edward King; Patricia Carlson-Kuhta; Martina Mancini; Fay B. Horak; Kristen Sowalsky; James McNames; Mahmoud El-Gohary (Sensors, 2023)