[1] Univ Szeged, Dept Family Med, Szeged, Hungary
[2] Univ Hosp A Coruna, CHUAC Complexo Hosp Univ, La Coruna, Spain
[3] Fatebenefratelli Hosp Benevento, Cardiol Div, Benevento, Italy
[4] Inst Nacl Cardiol Ignacio Chavez, Mexico City, DF, Mexico
[5] Heart & Brain Hosp, Heart & Brain Ctr Excellence, Pleven, Bulgaria
[6] St Petersburg State Univ, Cardiol Dept, St Petersburg, Russia
[7] Inst Cardiovasc Buenos Aires, Buenos Aires, DF, Argentina
[8] Vilnius Univ, Ctr Cardiol & Angiol, Clin Cardiac & Vasc Dis, Vilnius, Lithuania
[9] Univ Fed Parana, Hosp Clin UFPR, Med Dept, Curitiba, Parana, Brazil
[10] ASL Salerno, UOC Cardio UTIC Emodinam, PO Umberto 1, Nocera Inferiore ASL Salerno, Salerno, Italy
[11] Osped Infermi, Dept Cardiol, Faenza, Italy
[12] Med Hosp Ctr Zvezdara, Clin Cardiol Dept, Belgrade, Serbia
[13] Natl Council Res, Biomed Dept, Inst Clin Physiol, Pisa, Italy