[1] Aristotle Univ Thessaloniki, Hippokration Gen Hosp, Dept Cardiol 2, Thessaloniki 54642, Greece
[2] Univ Thessaloniki, Fac Med, Sch Hlth Sci Aristotle, Propedeut Dept Internal Med 2, Thessaloniki 54642, Greece
[3] Natl & Kapodistrian Univ Athens, Hippokration Gen Hosp, Sch Med, Cardiol Dept 1, Athens 11528, Greece
[4] Ras Al Khaimah Med & Hlth Sci Univ, POB 11172, Ras Al Khaymah, U Arab Emirates
[5] Univ Palermo, Sch Med, Dept Hlth Promot Mother & Child Care, Internal Med & Med Specialties Promise, I-90100 Palermo, Italy