1. Department of Nephrology and Medical Intensive Care, Charité Universitätsmedizin Berlin, 10117 Berlin, Germany
2. Institute of Virology, Charité Universitätsmedizin Berlin, Labor Berlin-Charité-Vivantes GmbH, 10117 Berlin, Germany
3. Institute of Virology, Universitätsklinikum Ulm, 89081 Ulm, Germany