Durability of bioprosthetic aortic valves in patients under the age of 60 years – rationale and design of the international INDURE registry oleh Bart Meuris, Michael A. Borger, Thierry Bourguignon, Matthias Siepe, Martin Grabenwöger, Günther Laufer, Konrad Binder, Gianluca Polvani, Pierluigi Stefano, Enrico Coscioni, Wouter van Leeuwen, Philippe Demers, Francois Dagenais, Sergio Canovas, Alexis Theron, Thierry Langanay, Jean-Christian Roussel, Olaf Wendler, Giovanni Mariscalco, Renzo Pessotto, Beate Botta, Peter Bramlage, Ruggero de Paulis