A Pilot Study Investigating the Effect of Serum 25-Hydroxyvitamin D on Device-Estimated Sleep Metrics in Young Black Women: A Single-Arm Open-Label Clinical Trial - Michele N D’Agata; Krista M Szymanski; Freda Patterson; Mackenzie L Rattigan; Alexs A Matias; David G Edwards; Christopher R Martens; Sushant M Ranadive; Melissa A Witman (SLEEP Advances, 2026)