1. The Australian Rickettsial Reference Laboratory/Barwon Biomedical Research, The Geelong Hospital, Bellarine Street, Geelong, Victoria, Australia 3220
2. Division of Health Sciences, School of Veterinary and Biomedical Sciences, Murdoch University, South Street Murdoch, Western Australia 6156, Australia
3. The Alfred Hospital, Melbourne, Victoria, Australia 3000
4. Mahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, 420/6 Rajvithi Road, Bangkok 10400, Thailand
5. Centre for Clinical Vaccinology and Tropical Medicine, Nuffield Department of Clinical Medicine, Churchill Hospital, University of Oxford, Oxford, United Kingdom
6. Viral and Rickettsial Diseases Department, Naval Medical Research Center, 503 Robert Grant Avenue, Silver Spring, Maryland 20910-7500
7. Department of Preventive Medicine & Biometrics, Uniformed Services University of the Health Sciences, 4301 Jones Bridge Road, Bethesda, Maryland 20814-4799