“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”, Pjmcr, vol. 5, no. 2, pp. 6975–6985, Jun. 2026, doi: 10.66021/pakmcr1502.