1. Department of Medicine, Geneva University Hospitals, Chemin Venel 7, 1206Geneva, Switzerland.
2. Faculty of Life Sciences and Education, University of South Wales, Pontypridd, Wales.
3. Advanced Medical and Dental Institute, Universiti Sains Malaysia, Penang, Malaysia.
4. Institute of Population Health, University of Liverpool, Liverpool, England.
5. Department of Oral Biology, Sharif Medical and Dental College, Lahore, Pakistan.
6. Instituto de Higiene e Medicina Tropical, Universidade Nova de Lisboa, Lisbon, Portugal.