Early and midterm results of frozen elephant trunk operation with Evita open stent-graft in patients with Marfan syndrome: results of a multicentre study oleh Kazimierz Jan Widenka, Monika Kosiorowska, Heinz Jakob, Davide Pacini, Wolfgang Hemmer, Martin Grabenwoeger, Thanos Sioris, Anton Moritz, Konstantinos Tsagakis