1. Center for Surgery; Medical Center; University of Freiburg; Freiburg Germany
2. Institute of Nursing Science; University of Basel; Basel Switzerland
3. Department of Nursing and Allied Health Care Professionals; University Hospital Zurich; Zurich Switzerland
4. Department of Nursing Science; Faculty for Health; University Witten/Herdecke; Witten/Herdecke Germany
5. Practice Development Unit; Department Nursing & Allied Health Professions; University Hospital Basel; Basel Switzerland