[1] Natl & Kapodistrian Univ Athens, Laiko Gen Hosp, Clin Nephrol & Renal Transplantat, Athens, Greece
[2] Aristotle Univ Thessaloniki, Dept Nephrol, Hippokrat Hosp, Thessaloniki, Greece
[3] Natl & Kapodistrian Univ Athens, Laiko Gen Hosp, Cardiovasc Prevent & Res Unit, Athens, Greece