[1] Natl & Kapodistrian Univ Athens, Univ Gen Hosp ATTIKON, Med Sch, Dept Cardiol 2, Athens, Greece
[2] Thriasio Gen Hosp, Dept Cardiol, Elefsina, Greece
[3] Univ Gen Hosp Larissa, Dept Cardiol, Larisa, Greece
[4] Univ Hosp Ioannina, Dept Cardiol 2, Ioannina, Greece
[5] Gen Hosp Nikea, Dept Cardiol 1, Piraeus, Greece
[6] Natl & Kapodistrian Univ Athens, Hippokrat Hosp, Med Sch, Dept Cardiol 1, Athens, Greece
[7] Democritus Univ Thrace, Med Sch, Dept Cardiol, Dragana, Alexandroupolis, Greece
[8] Gen Hosp Nikea, Dept Cardiol 2, Piraeus, Greece
[9] Gen Hosp Athens Evangelismos, Dept Cardiol 2, Athens, Greece
[10] Univ Gen Hosp Thessaloniki, Dept Cardiol 1, AHEPA, Thessaloniki, Greece
[11] Aristotle Univ Thessaloniki, Hippokrat Univ Hosp, Dept Cardiol 3, Thessaloniki, Greece
[12] Heraklion Univ Hosp, Dept Cardiol, Iraklion, Greece
[13] Patras Univ Hosp, Dept Cardiol, Patras, Greece
[14] Univ Athens, Alexandra Hosp, Dept Clin Therapeut, Athens, Greece
[15] Natl & Kapodistrian Univ Athens, Attikon Univ Hosp, Med Sch, Dept Cardiol 2, Athens 12462, Greece