Funding for this research was provided by:
ScandTick Innovation
ALF Foundation of the Sahlgrenska Academy at the Gothenburg University
Article History
Received: 31 October 2018
Revised: 4 February 2019
Accepted: 14 February 2019
First Online: 8 March 2019
Compliance with ethical standards
: The study was approved by the Gothenburg Ethical Committee (EPN 229-14) and informed written consent was obtained from all patients and controls (EPN 361-96).
: The authors declare that they have no conflicts of interest.