- Correspondence to Dr Marius Steiro Fimland, NTNU, Fakultet for medisin og helsevitenskap, Institutt for samfunnsmedisin og sykepleie, Postboks 8905, MTFS, 7491 Trondheim, Norway;
- Received 18 January 2017
- Revised 25 May 2017
- Accepted 3 June 2017
- Published online 11 July 2017.
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