Borulu, F., Arslan, U., Çalik, E., & Erkut, B. (2021). Postoperative clinical outcome of aortic valve surgery in elderly patients and the effect of advanced age on atrial fibrillation: a comparative retrospective study. International Surgery Journal, 8(2), 509–515. https://doi.org/10.18203/2349-2902.isj20210361