Funding for this research was provided by:
Magnus Bergvalls Stiftelse
Stiftelsen Konung Gustaf V:s 80-årsfond
Stockholms Läns Landsting
Foundation for the National Institutes of Health (R01 AR069572, R01 AR043727)
Åke Wiberg Stiftelse
Received: 31 August 2017
Accepted: 30 January 2018
First Online: 26 February 2018
Ethics approval and consent to participate
: The study was approved by the local ethics committee at Karolinska University Hospital and all study subjects provided written informed consent.
: Not applicable.
: The authors declare that they have no competing interests.
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