Received: 11 September 2019
Accepted: 21 July 2020
First Online: 29 July 2020
Ethics approval and consent to participate
: The study was approved by the Medical Center University Freiburg ethics committee (Reference Number 578/16). Informed consent was received from all participants.
: Not applicable.
: PK has no competing interests to disclose. AP reports personal fees for presentations and training activities from Biogen, outside the submitted work; JK reports grants, personal fees, and nonfinancial support from Biogen; grants, personal, fees and nonfinancial support from Roche; personal fees and nonfinancial support from Avexis, outside the submitted work; TL participated in a sponsored workshop by Biogen.