Funding for this research was provided by:
Deutsche Forschungsgemeinschaft (EG110/15-1)
Received: 18 November 2020
Accepted: 25 January 2021
First Online: 4 February 2021
Ethics approval and consent to participate
: The study was reviewed by the Ethics Committee of the Medical Faculty of Aachen (EK303-18). All individuals and caregivers gave written informed consent before participation. The study was performed in accordance with the Declaration of Helsinki of the World Medical Association.
: Not applicable.
: The other authors have nothing to declare.