Al-Busaidi, Nasser H., Zulfikar Habibullah, and Joan B. Soriano. “The Asthma Cost in Oman”. Sultan Qaboos University Medical Journal 13, no. 2 (May 1, 2013): 218–223. Accessed April 29, 2024. https://journals.squ.edu.om/index.php/squmj/article/view/1751.