1. Pathology Institute of Medical Genetics and Pathology University Hospital BaselUniversity of Basel BaselSwitzerland
2. Clinical Virology, Laboratory Medicine University Hospital Basel BaselSwitzerland
3. Infectious Diseases and Hospital Epidemiology University Hospital Basel BaselSwitzerland
4. Department Biomedicine Transpantation and Clinical Virology University of Basel Basel Switzerland
5. Department of Pathology Duke University Medical Center Durham NC USA