title: Evaluation of nonproportional treatment effects in cancer clinical trials.
authors.affiliation: Institute of Medical Biometry and Informatics, University of Freiburg, Federal Republic of Germany.
authors.forename: M
authors.initials: M
authors.lastname: Schumacher
mesh_terms: D005069:Evaluation Studies as Topic; D005260:Female; D006801:Humans; D016016:Proportional Hazards Models; D016032:Randomized Controlled Trials as Topic / Q000706:statistics & numerical data*