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Elif Sakızlı Erdal;Arzu Demirgüç;Mehmet Kabalcı;Hüseyin Demirtaş;. (2021). Evaluation of physical activity level and exercise capacity in patients with varicose veins and chronic venous insufficiency . Phlebology: The Journal of Venous Disease, (), –. doi:10.1177/02683555211002339 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research