1. Institute of Molecular Biology, University of Zürich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland
2. Crucell Holland BV, Archimedesweg 4, 2333 CN Leiden, The Netherlands
3. Molecular Medicine Program and Virology and Gene Therapy Track, Mayo Clinic College of Medicine, Rochester, MN 55905, USA
4. Institute of Zoology, University of Zürich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland