title: Methodological and ethical difficulties in clinical oncology studies.
authors.forename: G R
authors.initials: GR
authors.lastname: Brera
authors.forename: C
authors.initials: C
authors.lastname: Violato
mesh_terms: D000328:Adult; D002986:Clinical Trials as Topic / Q000379:methods* / Q000592:standards; D004359:Drug Therapy, Combination; D004992:Ethics, Medical; D006801:Humans; D007558:Italy; D009369:Neoplasms / Q000188:drug therapy*; D018579:Patient Selection; D012107:Research Design