1. Dublin Dental School and Hospital and Trinity College, Dublin, Ireland
2. Dental Protection, London, United Kingdom
3. Infectious Disease Programme, Grady Health System, Atlanta, Georgia
4. Arizona School of Dentistry, Mesa, Arizona
5. Faculty of Dentistry and WHO Collaborating Centre for Oral Health, University of the Western Cape, Cape Town, South Africa
6. Department of Clinical Microbiology, School of Oral Health Sciences, University of the Witwatersrand, Johannesburg, South Africa