Pulmonary involvement in rheumatoid arthritis: A cross-sectional study in Iran oleh Habib Zayeni, Asghar Haji-Abbasi, Seyed Ali Alavi Foumani, Mehdi Tohidi, Irandokht Shenavar Masooleh, Banafsheh Ghavidel Parsa, Mehrdad Aghaei, Amir Hassankhani, Pooneh Ghavidel Parsa, Alireza Amir Maafi