Funding for this research was provided by:
Norges Forskningsråd (222088)
Text and Data Mining valid from 2019-12-01
Received: 19 March 2019
Accepted: 8 December 2019
First Online: 23 December 2019
Ethics approval and consent to participate
: Permission was granted from the head of the NH and from the Data Protection Official for the University of Oslo (NSD 37368). The study did not require approval from Regional committee for medical and health research ethics (2013/19937). Staff members were informed in writing and orally about the study, and asked if they wanted to participate. All agreed and gave their written consent. Written informed consent for participation was also received from the residents.
: Not applicable.
: The authors declare that they have no competing interests.