1. From Boston University School of Public Health, Boston Medical Center, Boston University School of Medicine, and Harvard Medical School, Boston, Massachusetts; Centers for Disease Control and Prevention and Emory University, Atlanta, Georgia; Mount Auburn Hospital, Cambridge, Massachusetts; University of Amsterdam, Amsterdam, the Netherlands;
2. University of Zürich Centre for Travel Medicine, WHO Collaborating Centre for Travellers' Health, Epidemiology, Biostatistics and Prevention Institute, Zürich, Switzerland; Harbor Hospital, Rotterdam, the Netherlands; Vall d'Hebron University Hospital, Universitat Autònoma de Barcelona, PROSICS Barcelona, Barcelona, Spain;
3. Karolinska University Hospital, Stockholm, Sweden; Groupe Hospitalier Pitié-Salpêtrière, UPMC University, Paris, France; Bronx-Lebanon Hospital Center and Icahn School of Medicine at Mount Sinai, Bronx, New York; Charité-Universitätsmedizin Berlin, Berlin, Germany; Geneva University Hospitals, Geneva, Switzerland;
4. Institute of Tropical Medicine, Antwerp, Belgium; Toronto General Hospital, University of Toronto, and Public Health Ontario Laboratories, Toronto, Ontario, Canada; Aix-Marseille University, Marseille, France; Johns Hopkins School of Medicine, Baltimore, Maryland; Alberta Children's Hospital, University of Calgary, Calgary, Alberta, Canada;
5. Monash University, Melbourne, Victoria, Australia; McGill University, Montreal, Quebec, Canada; Centre Hospitalier Universitaire de Bordeaux, Bordeaux, France; Pontificia Universidad Católica de Chile, Santiago, Chile; University Medical Center Hamburg-Eppendorf, Hamburg, Germany; Sheba Medical Center, Tel Hashomer, and the Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel;