?:authorAffiliation
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[\'Center for Economic and Social Studies in Health, Hospital Infantil de México Federico Gómez, Mexico City, Mexico.\', \'Geriatric Epidemiology Unit, Research Department, Instituto Nacional de Geriatría, Av. Contreras 428, Col. San Jerónimo Lídice, Alcaldía Magdalena Contreras, Mexico City, Mexico. marifercave@yahoo.com.mx.\', \'Epidemiological and Health Services Research Unit Aging Area, Centro Médico Nacional, Siglo XXI, Mexico City, Mexico.\', \'Research Unit in Evidence-Based Medicine, Hospital Infantil de México Federico Gómez, Mexico City, Mexico.\', \'Research Department, Hospital Infantil de México Federico Gómez, Mexico City, Mexico.\']
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