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APA Citation
Pérez-Zepeda, M. U., Cesari, M., Carrillo-Vega, M. F., Salinas-Escudero, G., Tella-Vega, P., & García-Peña, C. (2017). a Frailty Index from Next-of-Kin Data: A Cross-Sectional Analysis from the Mexican Health and Aging Study. BioMed research international, 2017, . http://access.bl.uk/ark:/81055/vdc_100082256974.0x000005