O. Yücel, H. Güneş, H. Yücel, and A. Zorlu, “Association between multidrug resistance-1 C3435T gene polymorphism and right ventricular dysfunction in patients with chronic obstructive pulmonary disease: cross-sectional study”, Sao Paulo Med J, vol. 136, no. 2, pp. 140–143, Apr. 2018.