Roussakis A, Gavalaki A, Contrafouris C, Petsios K, Zarkalis D, Ftikos P, Perreas K. Minimally invasive aortic valve replacement: Initial experience of the 1st Cardiac Surgery Department of Onassis Cardiac Surgery Center. A propensity score-adjusted analysis. Hellenic Journal of Cardiology [Internet]. 2020;61:346 ? 348.