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Journal of Clinical Epidemiology > 2007 > 60 > 3 > 250-255
Computational Statistics and Data Analysis > 1998 > 27 > 2 > 151-170
Journal of Clinical Epidemiology > 2007 > 60 > 3 > 250-255
Computational Statistics and Data Analysis > 1998 > 27 > 2 > 151-170