Sheaikh, R. A. ., Awan, H. ., Butt, M. ., Ali, A. ., Seher, N. E. ., Akram, H. ., & Kashif, M. . (2026). Diaphragmatic Thickening Fraction as a Predictor of Early Treatment Failure in Acute Exacerbation of COPD. Pakistan Journal of Medical & Health Sciences, 20(08 Aug), 3–12. https://doi.org/10.53350/pjmhs02026208.2