1. Infection Biology, Department of Biomedicine, University Hospital, CH-4056 Basel, Switzerland
2. University of Fribourg, Department of Chemistry, Chemin du Musée 9, CH-1700 Fribourg, Switzerland
3. National Institute of Allergy and Infectious Diseases, The National Institutes of Health, Bldg. 33, 1W10, 9000 Rockville Pike, Bethesda, Maryland 20892
4. Research Technologies Branch, Genomics Unit, Rocky Mountain Laboratories, National Institute of Allergy and Infectious Diseases, The National Institutes of Health, 903 South 4th Street, Hamilton, Montana 59840