1. Ospedale A. Manzoni, Lecco, Italy
2. Ospedale ‘Maggiore della Carità’, Novara, Italy
3. Centre Hospitalier Régional Universitaire de Lille, France
4. Isala Hospital, Zwolle, The Netherlands
5. Klinikum Ludwigshafen, Ludwigshafen, Germany
6. Ospedale Niguarda Ca’ Granda, Milano, Italy
7. Universitäres Herzzentrum Lübeck, Germany
8. Centre Hospitalier Universitaire Pitié-Salpêtriėre, Paris, France
9. Ospedale San Donato, Arezzo, Italy