Ma. Guadalupe Jiménez-García, Geriatrics Service, Hospital Central Norte de Petróleos Mexicanos, Mexico City, Mexico
Julio C. Sánchez-Basurto, Geriatrics Service, Hospital Central Norte de Petróleos Mexicanos, Mexico City, Mexico
Liliana Gil-Salazar, Geriatrics Service, Hospital Central Norte de Petróleos Mexicanos, Mexico City, Mexico