Assandri, Jole Assouline, Benjamin Astarcioglu, Mehmet Ali Astuto, Marinella Ata, Naim, Kecioren Teaching and Research Hospital Ata, Yusuf Atalar, Enver Atalay, Huseyin Ateş, Ahmet Hakan, Samsun Mehmet Aydın Education and Research Hospital Ates, Ahmet Hakan Athyros, Vasilios G., 2nd Department of Internal Medicine, Medical School, Aristotle University of Thessaloniki, Hippocration Hospital, Thessaloniki, Greece. Atienza, Felipe, Hospital General Universitario Gregorio Marañón Madrid Atienza Ayala, Saida Atilgan, Zuhal Attanà, Paola Attanasio, Philipp Attinger, Adrian Attinger-Toller, Adrian, University Heart Center, University Hospital Zurich Attinger-Toller, Adrian Attmann, Tim Atwood, J. Edwin Auer, Johann Aung, Soe Moe Aung, Tania, Department of Internal Medicine, University of Rochester Medical Center, Rochester, New York, USA Aurigemma, Cristina