Funding for this research was provided by:
the european research council (311292)
the swedish research council (2016-00906)
the swedish parkinson foundation (1127718, 2013)
the swedish parkinson academy (2015/542)
alf agreement (2018-Project0279)
lion’s research foundation (2017-03-29)
the research platform for collaboration for health, kristianstad university (2011-09-12, 2011-09-12)
Received: 19 October 2021
Accepted: 3 December 2022
First Online: 13 December 2022
: The study was conducted in accordance with the Declaration of Helsinki (1964) and its later amendments. All participants provided written informed consent prior to their inclusion in the study. The studies were approved by the Regional Ethics Committee in Lund, Sweden (Kristianstad University: 2009/429 and 2009/226; Lund University: 2008/290).
: Not applicable.
: The authors declare that they have no conflict of interest.