1. Division of Clinical Microbiology, Department of Laboratory Medicine, Karolinska Institute, ANA Futura, Campus Flemingsberg, Stockholm 14152, Sweden
2. Division of Infectious Diseases, Department of Medicine Huddinge, Karolinska Institute, ANA Futura, Campus Flemingsberg, Stockholm 14152, Sweden
3. Division of Chemistry I, Department of Medical Biochemistry and Biophysics, Karolinska Institute, Stockholm 14152 Sweden
4. Department of Molecular Microbiology and Immunology and the Bond Life Science Center, University of Missouri, Columbia, Missouri 65211, United States