1. Department of Evolutionary Biology, University of Vienna , Vienna 1030, Austria
2. Division of Clinical Virology, Department of Laboratory Medicine, Medical University of Vienna , Vienna 1090, Austria
3. Department of Ecology and Evolutionary Biology, Yale University , New Haven, CT 06520, USA
4. Yale Systems Biology Institute, Yale University , West Haven, CT 06516, USA
5. Department of Obstetrics, Gynecology and Reproductive Sciences, Yale School of Medicine , New Haven, CT 06510, USA