[1] Aristotle Univ Thessaloniki, Gen Hosp Hippokrat, Propedeut Dept Internal Med 2, Thessaloniki, Greece
[2] Aristotle Univ Thessaloniki, Gen Hosp Hippokrat, Dept Cardiol 3, Thessaloniki, Greece
[3] Aristotle Univ Thessaloniki, Gen Hosp AHEPA, Cardiol Dept 1, Thessaloniki, Greece
[4] VAMC, Washington, DC USA
[5] George Washington Univ, Washington, DC USA