Text and Data Mining valid from 2018-07-10
Received: 4 October 2017
Accepted: 2 July 2018
First Online: 10 July 2018
Ethics approval and consent to participate
: Both surveys, including linkage to national registers, were evaluated and endorsed by the coordinating ethical committee of the Hospital District of Helsinki and Uusimaa in Finland (The Maamu study; 325/13/03/00/2009, and the Finnish National Health 2011 survey 45/13/03/00/11). Each participant signed the informed consent before the interview.
: Not applicable.
: The authors declare that they have no competing interests.
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