Funding for this research was provided by:
Stockholms Läns Landsting (20080273)
Text and Data Mining valid from 2018-09-07
Received: 29 November 2017
Accepted: 28 August 2018
First Online: 7 September 2018
Compliance with ethical standards
: All authors declare that they have no conflict of interest in relation to the present study.
: The Ethics Committee of the Karolinska Institutet at the Campus Flemingsberg, Stockholm, Sweden, approved study protocols (Dnr 2017/490-31/4). All studies were conducted in adherence to the Declaration of Helsinki.