Article History
Received: 13 July 2018
Accepted: 16 November 2018
First Online: 11 December 2018
Ethics approval and consent to participate
: The Ethics Committee of the Northern Ostrobothnia Hospital District in Oulu, Finland approved the study protocol, which followed the principles of the Declaration of Helsinki. The participants’ participation was voluntary and all provided their written informed consent. The data were handled on a group level only, and identification codes replaced the personal information.
: Not applicable.
: The authors declare that they have no competing interests.
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