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Difficulties in accessing health services among the elderly in the city of São Paulo-Brazil

Fig 1

Sample distribution of the SABE Study, years 2000, 2006, 2010 and 2015.

São Paulo-Brazil. a Primary sample. b Reinterviewed elderly. c Elderly people aged 60 to 64 included. d Number of elderly in each cohort.

Fig 1

doi: https://doi.org/10.1371/journal.pone.0268519.g001