D. Ausserhofer, M. Schubert, S. Engberg, M. Blegen, S. De Geest, and R. Schwendimann, “Nurse-reported patient safety climate in Swiss hospitals: A descriptive-explorative substudy of the Swiss RN4CAST study”, Swiss Med Wkly, vol. 142, no. 0304, p. w13501, Jan. 2012.