Prediction of outcomes in patients with severe aortic stenosis after multiple valve surgery. Issue 1 (December 2015) - Podpalov, Vladislav; Sevrukevitch, Vasily; Kurganovich, Svetlana; Spirydonau, Siarhei; Russkih, Irina; Kolyadko, Marina; Deev, Alexander; Ostrovsky, Yuri