1. The Lundquist Institute, Torrance, California, USA
2. UCSF School of Medicine, San Francisco, California, USA
3. Departments of Medicine and Medical Microbiology/Immunology, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin, USA
4. Department of Pathology, Riverside University Health Systems, Riverside, California, USA
5. Geffen School of Medicine at UCLA, Los Angeles, California, USA