About the Authors

May Trude Johnsen

maytrude@online.no

Affiliation Department of Clinical Medicine, Faculty of Health Sciences, University of Tromsø, Tromsø, Norway

Rolf Wynn

Affiliations Department of Clinical Medicine, Faculty of Health Sciences, University of Tromsø, Tromsø, Norway, University Hospital of North Norway, Tromsø, Norway

Trond Bratlid

Affiliations Department of Clinical Medicine, Faculty of Health Sciences, University of Tromsø, Tromsø, Norway, University Hospital of North Norway, Tromsø, Norway

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Designed the research questionnaire: TB. Analyzed the data: MTJ RW TB. Contributed reagents/materials/analysis tools: TB. Wrote the paper: MTJ RW TB.