1. Department of Chemistry and CENIDE, University of Duisburg-Essen, 45141 Essen, Germany
2. Miprolab—Gesellschaft für mikrobiologische Diagnostik mbH, 37079 Göttingen, Germany
3. Paul-Ehrlich Institut, Department of Microbiology, 63225 Langen, Germany
4. Paul-Ehrlich Institut, Department of Virology, 63225 Langen, Germany
5. Institute for Virology, University Clinics Essen, University of Duisburg-Essen, 45147 Essen, Germany