title: When pain becomes never ending.
mesh_terms: D002908:Chronic Disease; D006801:Humans; D009369:Neoplasms / Q000150:complications; D010146:Pain / Q000145:classification / Q000188:drug therapy / Q000209:etiology / Q000523:psychology; D010166:Palliative Care / Q000379:methods*; D016896:Treatment Outcome