Missing covariate data in medical research: To impute is better than to ignore
Kristel J.M. Janssen(University Medical Center Utrecht), Karel G.M. Moons(University Medical Center Utrecht), Frank E. Harrell(Vanderbilt University Medical Center), Yvonne Vergouwe(Erasmus MC), A. Rogier T. Donders(Radboud University Nijmegen), Qingxia Chen(Vanderbilt University), Diederick E. Grobbee(University Medical Center Utrecht)
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