Funding for this research was provided by:
Karolinska Institute
Article History
Received: 13 September 2017
Accepted: 13 March 2018
First Online: 27 March 2018
Compliance with ethical standards
:
: The authors have no conflict of interest to state.
: The study was approved by the Research Ethics Committee at Karolinska Institutet, and was conducted according to the Declaration of Helsinki. All persons gave their informed consent prior to inclusion in the study.