[1] Univ Athens, Fac Nursing, St Savvas Hosp, Hellen Anticanc Inst, Sapfous 2 Kallithea, Athens 17676, Greece
[2] St Savvas Hosp, Hellen Anticanc Inst, Athens, Greece
[3] Univ Athens, Fac Nursing, Athens, Greece
[4] Univ Utrecht, GIS AUEB, Athens, Greece
[5] Gen Univ Hosp Patras, Dept Anesthesiol, Patras, Greece
[6] Univ Athens, Fac Nursing, Nursing Anesthesiol, Athens, Greece