Hameed Al-Tayyar, Ahmed S., Najeeb H. Mohammed, and Nizar A. Jasim. 2013. “Pulmonary Involvement for Patients With Rheumatoid Arthritis: Spirometric Study”. Journal of the Faculty of Medicine Baghdad 54 (4): 361-64. https://doi.org/10.32007/jfacmedbagdad.544706.