Funding for this research was provided by:
Vetenskapsrådet (VR 2012-70X-22122-01-3)
Stiftelsen Handlanden Hjalmar Svenssons
Willhelm and Martina Lundgren’s Foundation
Text and Data Mining valid from 2018-07-18
Received: 17 January 2018
Accepted: 29 June 2018
First Online: 18 July 2018
Ethics approval and consent to participate
: The study was approved by the Regional Ethics Committee of Gothenburg (registration number 225/08, 318–04); written informed consent was obtained from the participants.
: Not applicable.
: The authors declare that they have no competing interests.
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