Obesity-Driven Exacerbation of Obstructive Sleep Apnea Severity in COPD: A Cross-Sectional Polysomnographic Study from Pakistan. Body Mass Index and Neck Circumference as Independent Predictors of Apnea Severity in the COPD–OSA Overlap. (2026). Pakistan Journal of Medical & Cardiological Review, 4(4), 2701-2711. https://doi.org/10.5281/zenodo.21460047