Text and Data Mining valid from 2017-09-02
Received: 28 March 2017
Accepted: 10 August 2017
First Online: 2 September 2017
Ethics approval and consent to participate
: All patients gave their written informed consent. The regional ethics committees in Linköping (DNR 2012/273-31), Lund (DNR Lu 464/2008), and Umeå (DNR 09-095 M) approved the study protocol, which was performed in accordance with the Declaration of Helsinki.
: Not applicable.
: The authors declare that they have no competing interests.
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