Funding for this research was provided by:
Juho Vainion Säätiö
Research committee of the kuopio university hospital catchment area for the state research funding
Strategic Research Council (Consortium:312703, WP4:312704)
Received: 22 May 2018
Accepted: 30 October 2018
First Online: 14 November 2018
Ethics approval and consent to participate
: The use of the data in this research was approved by the Ethics Committee of the North Savo Hospital District on 13.11.2012. This was a register-based study and consent from the patients is not needed.
: Not applicable.
: The authors declare that they have no competing interests.
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