1. Center for Population Genomics and Pharmacogenetics, Duke Institute for Genome Sciences and Policy, Duke University, Durham, NC 27710, USA.
2. Duke Institute for Genome Sciences and Policy, Duke University, Durham, NC 27710, USA.
3. Institute of Microbiology, University Hospital Center; and University of Lausanne, 1011 Lausanne, Switzerland.
4. Division of Infectious Diseases, University Hospital, 8091 Zürich, Switzerland.
5. Clinic of Infectious Diseases, Istituto di Ricovero e Cura a Carattere Scientifico, San Raffaele Hospital, 20127 Milan, Italy.