Received: 5 March 2019
Accepted: 26 February 2020
First Online: 5 March 2020
Ethics approval and consent to participate
: The study was exempt from ethical approval according to the regulations of the Ethical Committee of the Medical Faculty of Heidelberg University because we did not conduct medical research on human subjects.
: Not applicable
: RJ is an alumni of the student organization Universities Allied for Essential Medicines (UAEM).