1. Faculty of Medicine and Biomedical Sciences, The University of Yaoundé I, Cameroon
2. Department of Geriatrics, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City, Mexico
3. University Bordeaux, Inserm, Bordeaux Population Health Research Center, Bordeaux, France
4. Centre Hospitalier de Villeneuve/lot, France
5. Bordeaux University, ISPED, Bordeaux, France
6. CHU of Pointe-à-Pitre, French West Indies University (Guadeloupe)