title: Observational studies are just as effective as randomized clinical trials.
authors.affiliation: University of Michigan, Ann Arbor, MI 48103, USA. bobwolfe@umich.edu
authors.forename: R A
authors.initials: RA
authors.lastname: Wolfe
mesh_terms: D006801:Humans; D007674:Kidney Diseases / Q000628:therapy; D019370:Observation / Q000379:methods*; D015588:Observer Variation; D016032:Randomized Controlled Trials as Topic / Q000379:methods* / Q000592:standards; D006435:Renal Dialysis / Q000379:methods / Q000592:standards; D012107:Research Design