K. Haj Hammo, Mohammad, Dhia J. Al layla, and Rami M. A. Al Hayali. “Prevalence of Gastro-Oesophageal Reflux Symptoms in Patients With COPD”. Annals of the College of Medicine, Mosul 32, no. 1 (December 1, 2006): 18–22. Accessed September 4, 2025. https://ojs.uomosul.edu.iq/index.php/mmed/article/view/37489.