1. Institute of Virology, University of Leipzig, Leipzig, Germany
2. Faculty of Life Sciences, University of Leipzig, Leipzig, Germany
3. WHO European Regional Reference Laboratory for Measles and Rubella, Department of Infection and Immunity, Luxembourg Institute of Health, Esch-Sur-Alzette, Grand-Duchy of Luxembourg
4. WHO European Regional Reference Laboratory for Measles and Rubella, Robert Koch Institute, Berlin, Germany