University, Sultan Qaboos. “Second National Update on Chronic Obstructive Pulmonary Disease (COPD) Oman Respiratory Society and Sultan Qaboos University 14th October 2010”. Sultan Qaboos University Medical Journal 11, no. 3 (December 1, 2011): 436–438. Accessed October 31, 2024. https://journals.squ.edu.om/index.php/squmj/article/view/1619.