1. Nursing Science; Charité-Unversitätsmedizin Berlin; Berlin Germany
2. Department of Nursing; Quchan Branch; Islamic Azad University; Quchan Iran
3. School of Nursing Sciences; Faculty of Medicine and Health Sciences; University of East Anglia; Norwich UK
4. Department of Health Services Research; Faculty of Health, Medicine and Life Sciences; Maastricht University; Maastricht Netherlands
5. Department for Nursing Science; Charité-Unversitätsmedizin Berlin; Berlin Germany