[1] Univ Athens, EKPA ATTIKON Univ Gen Hosp, Dept Internal Med 4, Athens, Greece
[2] EKPA ATTIKON Univ Gen Hosp, Allergy Unit, Dept Dermatol & Venereol 2, Athens, Greece
[3] ATTIKON Univ Gen Hosp, EKPA, Dept Cardiol 2, Athens, Greece
[4] Ippokrateio Gen Hosp, Cardiol Dept, Athens, Greece
[5] Laikon Gen Hosp, Microbiol Lab, Athens, Greece
[6] YGEIA Gen Hosp, Dept Internal Med 6, Athens, Greece