Funding for this research was provided by:
The Social Insurance Institution of Finland (37/26/2011, 31/26/2015)
Pirkanmaa Hospital District, Tampere, Finland (9M099, 9K127)
Text and Data Mining valid from 2018-12-01
Received: 4 May 2018
Accepted: 3 December 2018
First Online: 17 December 2018
Ethics approval and consent to participate
: The Ethics Committee of Pirkanmaa Hospital District (ETL code R08157) approved the study protocol. The participants recruited to the study received a written information letter clarifying the aims of the study, including risks and benefits. The participants provided their written consent to participate at the first study appointment. We also obtained consent for data sharing and the risk of identification is low.
: Not applicable.
: The authors declare that they have no competing interest.
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