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  "Author": "Hans Laevens, Luc Duchateau, Klara Goethals, Ewoud De Troyer\nand Paul Janssen",
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  "Description": "The udder quarter infection data set contains infection\ntimes of individual cow udder quarters with Corynebacterium\nbovis (Laevens et al. 1997\n<DOI:10.3168/jds.S0022-0302(97)76295-7>). Obviously, the four\nudder quarters are clustered within a cow, and udder quarters\nare sampled only approximately monthly, generating\ninterval-censored data. The data set contains both covariates\nthat change within a cow (e.g., front and rear udder quarters)\nand covariates that change between cows (e.g., parity [the\nnumber of previous calvings]). The correlation between udder\ninfection times within a cow also is of interest, because this\nis a measure of the infectivity of the agent causing the\ndisease. Various models have been applied to address the\nproblem of interdependence for right-censored event times.\nThese models, as applied to this data set, can be found back in\nthe publications found in the reference list.",
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