Revisiting vitamin D and home-based exercises for patients with sleep apnea facing the COVID-19 quarantine Revisiting vitamin D and home-based exercises for patients with sleep apnea facing the COVID-19 quarantine Download Racial disparities in positive airway pressure therapy adherence among veterans with obstructive sleep apnea Sleep disparities in the era of the COVID-19 pandemic highlight the urgent need to address social determinants of health like the virus of racism