1. From the University of Michigan, Department of Internal Medicine, Ann Arbor; the Stowers Institute for Medical Research, Kansas City, MO; the University of Washington, Departments of Pediatrics, Microbiology, Surgery, and Molecular Biotechnology, Seattle; the University of Bergen, Department of Pathology, Norway; the University of Alabama at Birmingham, Department of Microbiology; Stanford University, Department of Pathology, Stanford, CA; and the Institute for Systems Biology, Seattle, WA.