1. Institute for Virology and Immunobiology, University of Würzburg, D-97078 Würzburg, Germany
2. TeGenero ImmunoTherapeutics AG, D-97076 Würzburg, Germany
3. Division of Structural Biology, Graduate School of Pharmaceutical Sciences, Kumamoto University, Kumamoto 862-0973, Japan
4. Nuffield Department of Medicine, The University of Oxford, Oxford OX3 9DU, United Kingdom