[1] Natl & Kapodistrian Univ Athens, Fac Nursing, Clin Epidemiol Lab, Athens 11527, Greece
[2] Univ Thessaly, Fac Nursing, Larisa 45550, Greece
[3] PA Kyriakou Childrens Hosp, Dept Radiol, Athens 11527, Greece
[4] Univ Piraeus, Dept Tourism Studies, Piraeus 18534, Greece
[5] Natl & Kapodistrian Univ Athens, Fac Nursing, Ctr Hlth Serv Management & Evaluat, Athens 11527, Greece