1. National Centre for Infectious Diseases, Singapore
2. Department of Infectious Diseases, Institute of Infectious Diseases and Epidemiology, Tan Tock Seng Hospital, Singapore
3. Centre National de Référence des Rickettsia, Coxiella et Bartonella, Faculté de Médecine, Université de la Méditerranée, Aix-en-Provence, France
4. Australian Rickettsial Reference Laboratory, University Hospital, Geelong, Victoria, Australia
5. Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore