Funding for this research was provided by:
Jalmari ja Rauha Ahokkaan Säätiö
Received: 31 October 2017
Accepted: 7 February 2018
First Online: 14 February 2018
Ethics approval and consent to participate
: This is a questionnaire based study where participation was voluntary and since there was no intervention, the Finnish legislation does not require ethics committee handling.
: Not applicable.
: The authors declare that they have no competing interests.
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