1. Department of Molecular Biology, Max-Planck Institut für Infektionsbiologie, 10117 Berlin, Germany.
2. Department of Human Genetics, University of Chicago, Chicago, IL 60637, USA.
3. Department of Statistics, University of Washington, Seattle, WA 98195–4322, USA.
4. Department of Surgery, Yale University School of Medicine, New Haven, CT 06520–8062, USA.
5. Department of Medicine, New York University School of Medicine, New York, NY 10016–9196, USA.
6. VA Medical Center, Houston, TX 77030, USA.
7. Université Victor Segalen Bordeaux 2, 33076 Bordeaux, France.
8. Institut für Hygiene und Mikrobiologie, Universität Würzburg, Josef-Schneider Straβe 2, 97080 Würzburg, Germany.