Schaefer, Laura V. http://orcid.org/0000-0002-6289-6987
Bittmann, Frank N. http://orcid.org/0000-0003-4514-8060
Funding for this research was provided by:
German Society of ParkinsonĀ“s and Movement Disorders
Article History
Received: 7 October 2019
Accepted: 6 January 2020
First Online: 24 January 2020
Competing interests
: The authors declare no competing interests.