1. Department of Nephrology and Intensive Care; Charité - Universitätsmedizin Berlin; Campus Virchow-Klinikum; Berlin Germany
2. Berlin-Brandenburg Center for Regenerative Therapies (BCRT); Charité - Universitätsmedizin Berlin; Campus Virchow-Klinikum; Berlin Germany
3. Department of Medicine; Division of Nephrology; Helsinki University Central Hospital; Helsinki Finland
4. Department of Transplant Surgery; Helsinki University Central Hospital; Helsinki Finland
5. Department of Virology; Helsinki University Central Hospital and University of Helsinki; Helsinki Finland