1 Center for Tropical and Travel Medicine, Swiss Tropical and Public Health Institute, 4052 Basel, Switzerland.
2 University of Basel, 4001 Basel, Switzerland.
3 Division of Tropical and Humanitarian Medicine, Geneva University Hospitals, 1205 Geneva, Switzerland.
4 Department of Clinical Sciences, Institute of Tropical Medicine, 2000 Antwerp, Belgium.
5 Institute of Infectious Diseases and Tropical Medicine, Ludwig Maximillian University Hospital Centre, 80336 Munich, Germany.
6 Faculty of Medicine, University of Geneva, 1211 Geneva, Switzerland.
7 Dutch Coordination Center for Travellers Health Advice (LCR), 1018 WT Amsterdam, The Netherlands.
8 Health Services, German Foreign Office, Regional Medical Office for West Africa, 10117 Accra, Ghana.
9 Department of Clinical Research, Bernhard Nocht Institute for Tropical Medicine, 20359 Hamburg, Germany.
10 Division of Tropical Medicine, I. Department of Medicine, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany.
11 German Center for Infection Research, Partner Site Hamburg-Lübeck-Borstel-Riems, 20359 Hamburg, Germany.
12 International Medical Advice, KLM Health Services, 1118 AP Schiphol-Oost, The Netherlands.
13 Center for Infectious Diseases, Queen Astrid Military Hospital, 1120 Brussels, Belgium.
14 Department of Infectious Diseases, Inselspital, Bern University Hospital, University of Bern, 3010 Bern, Switzerland.
15 Department of Infectious Disease, Amsterdam University Medical Centre, 1007 MB Amsterdam, The Netherlands.
16 Travel Medicine Program, Clínica Alemana, Facultad de Medicina Clínica Alemana, Universidad del Desarrollo, 7650568 Santiago, Chile.
17 Leiden University Center for Infectious Diseases, Department of Infectious Diseases, Leiden University Medical Center, 2333 Leiden, The Netherlands.
18 Department of Public and Global Health, Epidemiology Biostatistics and Prevention Institute, WHO Collaborating Centre for Travellers' Health, University of Zürich, 8001 Zürich, Switzerland.
19 Department of Public Health and Tropical Medicine, College of Public Health, Medical and Veterinary Sciences, James Cook University, 4811 Townsville, Queensland, Australia.