1. University Hospital of Montpellier, Montpellier, France
2. Usher Institute of Population Health Sciences and Informatics, University of Edinburgh, Doorway 3, Medical School, Teviot Place, Edinburgh, UK
3. Desbrest Institute of Epidemiology and Public Health, UMR UA-11, University of Montpellier - INSERM
4. WHO Collaborating Centre on Scientific Classification Support, Montpellier, France