1. College of Medicine, Nursing and Health Sciences, University of Galway School of Medicine, , Galway, Ireland
2. Mahidol University Travel Medicine Research Unit, Department of Clinical Tropical Medicine, Faculty of Tropical Medicine, , Bangkok, Thailand
3. Epidemiology, Biostatistics and Prevention Institute, WHO Collaborating Centre on Travelers' Health, University of Zurich , Zurich, Switzerland
4. School of Public Health and Preventive Medicine , , Melbourne, Victoria, Australia
5. Monash University , , Melbourne, Victoria, Australia
6. Victorian Infectious Disease Service, Royal Melbourne Hospital , Melbourne, Victoria, Australia