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2531007
2531007
http://dx.doi.org/10.2307/2531007
A comparison of test statistics for assessing the effects of concomitant variables in survival analysis.
P356
Q52705249-78E8A950-73EC-40F4-ADBE-5AA7036B46AF
P356
2531007
http://dx.doi.org/10.2307/2531007