Funding for this research was provided by:
Stockholms Läns Landsting (2003-5)
Received: 20 March 2017
Accepted: 22 February 2018
First Online: 6 March 2018
Ethics approval and consent to participate
: The study was approved by the Research Ethics Committee South at KI, Stockholm, Sweden. All procedures performed in studies involving human patients were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. Written informed consent was obtained from all individual patients included in the study. Trial registration: July 22, 2012, retrospectively registered. ClinicalTrails.gov NCT01168661.
: “Not applicable”
: The authors declare that they have no competing interests.
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