1. University of Tromsø, 9037 Tromsø, Norway
2. Robert Koch Institute, 13353 Berlin, Germany
3. Technische Universität Dresden, Dresden, Germany
4. Karolinska Institutet, Stockholm, Sweden
5. Leiden University Medical Center, Leiden, the Netherlands
6. University of California, San Diego, USA
7. Biomedical Primate Research Centre, Rijswijk, the Netherlands