1. University of Washington, Seattle, Washington, USA
2. Institute of Medical Psychology and Behavioral Neurobiology, University of Tübingen, Germany
3. Department of Epidemiology and Social Medicine, Montefiore Medical Center/Albert Einstein College of Medicine, New York City, USA
4. Hershey, PA, USA
5. Network for Infection Prevention, Brattleboro, Vermont 05302, USA
6. Colorado Springs, Colorado, USA
7. Department of Family and Preventive Medicine, Emory University School of Medicine, Atlanta, GA, USA
8. University of Paris 7, France