“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, 5(2), pp. 6975–6985. doi:10.66021/pakmcr1502.