Sigari, N., Alhani, F., Seidi, J., Salehnejad, G., Gharib, A., & Daem, R. (2013). Risk factors of chronic obstructive pulmonary disease in men and women in Sanandaj, Iran. Chronic Diseases Journal, 1(1), 24–29. https://doi.org/10.22122/cdj.v1i1.12