Received: 22 December 2019
Accepted: 4 May 2020
First Online: 8 July 2020
Ethics approval and consent to participate
: The study protocols were approved by the medical faculty’s ethics committee at Martin Luther University Halle-Wittenberg (Halle, Germany) and conducted in accordance with the Declaration of Helsinki on Ethical Principles for Medical Research.
: Not applicable.
: Ramona Schweyen, Bilal Al-Nawas, Christin Arnold, and Jeremias Hey declare that they have no competing interests.