Institute of Biomedical Ethics, University of Zurich, Zurich, Switzerland.|Center for Infectious Disease Dynamics, Department of Biology, Penn State University, University Park, Pennsylvania, United States of America.|ProMED (Program for Monitoring Emerging Diseases), International Society for Infectious Diseases and University of Massachusetts Medical School, Worcester, Massachusetts, United States of America.|Childrens Hospital Informatics Program, Boston Childrens Hospital, Harvard Medical School, Boston, Massachusetts, United States of America.