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Implements methods from Besag,\nYork, and Mollié (1991) \"Bayesian image restoration, with two\napplications in spatial statistics\" ,\nGelfand and Vounatsou (2003) \"Proper multivariate conditional\nautoregressive models for spatial data analysis\"\n, Quick et al. (2017)\n\"Multivariate spatiotemporal modeling of age-specific stroke\nmortality\" , and Quick et al. 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