Funding for this research was provided by:
Text and Data Mining valid from 2017-07-19
Received: 28 March 2017
Accepted: 10 July 2017
First Online: 19 July 2017
Compliance with ethical standards
: The study was conducted in accordance with the Declaration of Helsinki of the World Medical Association [CitationRef removed]. Since the study did not involve any identifiable patient data, Swedish law and praxis consider this study as a part of normal clinical improvement procedures and approval by the Regional Ethics Committee was thus not necessary. Instead, ethical approval for the study was received from the operation managers and the heads of the departments at the hospitals. Written information about the study was then sent out to the head nurses of the participating wards who selected a responsible nurse for the study.
: The authors declare that they have no conflicts of interest.