1. Infectious Diseases Clinic, University Medical Center Hamburg-Eppendorf, Hamburg, Germany;
2. First Department of Medicine, Division of Infectious Diseases, University Medical Center Hamburg-Eppendorf, Hamburg, Germany;
3. German Centre for Infection Research (DZIF), Partner Site Hamburg-Lübeck-Borstel-Riems, Germany;
4. Pharmacy of the University Medical Center Hamburg-Eppendorf, Hamburg, Germany;
5. ICH Study Center GmbH & Co KG, Hamburg, Germany; and
6. Hein & Fiete - Der schwule Checkpoint, Hamburg, Germany.