title: Randomization within quality registries: a cost-effective complement to classical randomized trials.
mesh_terms: D002309:Cardiology / Q000191:economics* / Q000706:statistics & numerical data; D003362:Cost-Benefit Analysis; D011897:Random Allocation; D016032:Randomized Controlled Trials as Topic / Q000191:economics* / Q000706:statistics & numerical data; D012042:Registries / Q000706:statistics & numerical data*