Funding for this research was provided by:
German Federal Ministry of Health (NKP-332-054)
Text and Data Mining valid from 2019-03-15
Received: 26 January 2018
Accepted: 6 March 2019
First Online: 15 March 2019
Ethics approval and consent to participate
: The SPUPEO project was approved by the ethics committees of the German Federation of Nursing Science (DPG) under ethical clearance no. 14–010. Written informed consent was obtained from all participants.
: Not applicable.
: The authors declare that they have no competing interests.
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