Al-Rawas OA, Al-Riyami BM, Al-Kindy H, Al-Maniri AA, Al-Riyami AA. Regional Variation in the Prevalence of Asthma Symptoms among Omani School Children : Comparisons from Two Nationwide Cross-sectional Surveys Six Years Apart. Sultan Qaboos Univ Med J [Internet]. 2008Jul.1 [cited 2024Apr.29];8(2):157-69. Available from: https://journals.squ.edu.om/index.php/squmj/article/view/1351