SASIDHARAN, A.; FATHAHUDEEN A. CORRELATION BETWEEN AIRWAY RESISTANCE AS DETERMINED BY R20 AND SEVERITY OF OBSTRUCTIVE SLEEP APNEA AS DETERMINED BY APNEA HYPOPNEA INDEX IN PATIENTS WITH OBSTRUCTIVE SLEEP APNEAā€¯. International Journal of Medical Research and Review, v. 13, n. 1, p. 49-55, 11 Mar. 2025.