title: Cancer. Support groups: study casts some doubt.
mesh_terms: D001290:Attitude; D001943:Breast Neoplasms / Q000401:mortality* / Q000523:psychology; D005260:Female; D006801:Humans; D008017:Life Expectancy; D016032:Randomized Controlled Trials as Topic; D012657:Self-Help Groups; D012944:Social Support