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A new method of classifying prognostic comorbidity in longitudinal studies: Development and validation

Mary E. Charlson, Peter Pompei, Kathy L. Aleš et al. · Journal of Chronic Diseases · 1987 · 49.9K citations

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Radiotherapy plus Cetuximab for Squamous-Cell Carcinoma of the Head and Neck

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A Class of $K$-Sample Tests for Comparing the Cumulative Incidence of a Competing Risk

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Partial residuals for the proportional hazards regression model

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