title: Observational studies and randomized trials.
authors.forename: P Y
authors.initials: PY
authors.lastname: Liu
authors.forename: G
authors.initials: G
authors.lastname: Anderson
authors.forename: J J
authors.initials: JJ
authors.lastname: Crowley
mesh_terms: D000971:Antineoplastic Combined Chemotherapy Protocols / Q000627:therapeutic use; D015982:Bias; D001943:Breast Neoplasms / Q000628:therapy; D016022:Case-Control Studies; D015331:Cohort Studies; D018380:Hematopoietic Stem Cell Transplantation; D006801:Humans; D008228:Lymphoma, Non-Hodgkin / Q000188:drug therapy; D016032:Randomized Controlled Trials as Topic; D012107:Research Design