1. Department of Nursing, National and Kapodistrian University of Athens, 123 Papadiamantopoulou Str, Goudi, 11527 Athens, Greece
2. Department of Health Policy, Ministry of National Defense, Mesogeion Avenue 227–231, Holargos, 15561 Athens, Greece
3. Intensive Care Unit, General and Oncologic Hospital of Kifissia “AgioiAnargiri”, Kaliftaki 41 Str, Kifissia, 14564 Athens, Greece