Z. A. Sukhera, M. Z.- e-H. Mirza, R. Azam, I. Z. Gondal, A. M. Sukhera, and K. Arshad, “Left Ventricular Systolic Dysfunction in Patients of Obstructive Sleep Apnea Syndrome”, Pak Armed Forces Med J, vol. 73, no. 1, pp. 123–26, Feb. 2023, doi: 10.51253/pafmj.v73i1.7110.