1 University Hospital of Cologne, Department I of Internal Medicine, Cologne, Germany; FOM University of Applied Sciences, Cologne, Germany. Electronic address: Sebastian.wingen-heimann@uk-koeln.de.
2 Department of Medical Microbiology, Leiden University Medical Centre, Leiden, the Netherlands.
3 Department of Medical Microbiology, Leiden University Medical Centre, Leiden, the Netherlands; Centre for Infectious Disease, National Institute for Public Health and the Environment (RIVM), Bilthoven, the Netherlands.
4 Department of Internal Medicine, Infectious Diseases, University Hospital Frankfurt, Goethe University Frankfurt, Frankfurt am Main, Germany.