Reports of clinical studies of cancer chemotherapy are retrospective and uncontrolled.
Stogdale
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D000820:Animal Diseases / Q000188:drug therapy; D000818:Animals; D018849:Controlled Clinical Trials as Topic; D009369:Neoplasms / Q000188:drug therapy* / Q000662:veterinary*; D015203:Reproducibility of Results; D012107:Research Design; D012189:Retrospective Studies