Funding for this research was provided by:
Bundesministerium für Bildung und Forschung (01GM1103A)
Deutsche Forschungsgemeinschaft (LU 336/13-2 BI 195/54-2)
Joint Programme for Neurodegenerative Diseases (01ED1405)
Text and Data Mining valid from 2018-05-04
Received: 8 February 2018
Revised: 4 April 2018
Accepted: 5 April 2018
First Online: 4 May 2018
Compliance with ethical standards
: The study was approved by the medical ethical review boards of the participating medical clinics in Ulm, Warsaw and Umea in accordance with the ethical standards of the 1964 Declaration of Helsinki and its later amendments.
: All subjects gave their written informed consent.