1. Clinical Epidemiology Laboratory, Faculty of Nursing National and Kapodistrian University of Athens Athens Greece
2. Department of Radiology P. & A. Kyriakou Children's Hospital Athens Greece
3. Department of Tourism Studies University of Piraeus Piraeus Greece
4. Center for Health Services Management and Evaluation Faculty of Nursing National and Kapodistrian University of Athens Athens Greece
5. Faculty of Nursing National and Kapodistrian University of Athens Athens Greece
6. Faculty of Nursing University of Thessaly Larissa Greece