Menteşe, Ümit, Ahi Evren Chest Cardiovascular Surgery Education and Research Hospital Mercanoglu, Fehmi, Professor. Department of Cardiology, Istanbul School of Medicine, Istanbul University, Istanbul, Turkey Mercik, Jakub Meretta, Alejandro, Instituto Cardiovascular de Buenos Aires Merkely, Béla Merkely, Bela Merkle, Nico Merks, Piotr, Department of Pharmaceutical Technology, Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University in Torun, Poland Merks, Piotr Merks, Piotr (Poland) Merola, Federica Merza, Yaroslaw Merza, Yaroslaw Mesa, Dolores Messina, Antonio Methot, Michelle Metner, Elwira Metzler, Bernhard Metzner, Andreas Meucci, Francesco, Interventional Cardiology Unit, Heart And Vessels Department, AOU Careggi Florence Meyer, Matthias R. Meyer, Philippe Meyer-Szary, Jaroslaw Meyer-Szary, Jarosław Meyer-Szary, Jarosław (Poland)