Funding for this research was provided by:
Parkinson Vereniging (19-2015/MvHh)
Brain Foundation of The Netherlands (HA-2017-00227)
Text and Data Mining valid from 2019-07-31
Received: 21 May 2019
Accepted: 18 July 2019
First Online: 31 July 2019
Ethics approval and consent to participate
: Approval by the Medical Ethical Committee (METc) of the VU University Medical Center was obtained for the COGTIPS trial (METc registration number: 2016.543/NL58750.029.16). Participants in this study will provide written informed consent.
: Not applicable.
: The authors declare they have no competing interests.