1. Department of Geriatrics, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City, Mexico.
2. INSERM, Bordeaux Population Health Research Center, UMR 1219, University of Bordeaux, Bordeaux, France.
3. Department of Infectious Diseases, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City, Mexico.