Prevalence and Characteristics of Positional Obstructive Sleep Apnea in a Cohort of CPAP-intolerant Patients: A Retrospective Analysis Positional therapy for obstructive sleep apnoea - Srijithesh PR, Aghoram R, Goel A, Dhanya J Positional Therapy for Obstructive Sleep Apnea Patients: A 6-Month Follow-Up Study Trends in CPAP adherence over twenty years of data collection: a flattened curve