Received: 16 March 2020
Accepted: 6 May 2020
First Online: 14 July 2020
Ethics approval and consent to participate
: The study protocol was approved by the Goethe University (Frankfurt, Germany) ethics committee (register number 78/18).
: Not applicable.
: The authors Ausra Ramanauskaite, Frank Schwarz, Amira Begic, Puria Parvini, Maria Elisa Galarraga-Vinueza, and Karina Obreja stated explicitly that there are no conflicts of interest related to this article.