title: [Patient safety is difficult to achieve, difficult to evaluate].
authors: per.nilsen@liu.se
authors: Per
authors: P
authors: Nilsen
authors: Mikaela
authors: M
authors: Nygren
authors: Annica
authors: A
authors: Ohrn
authors: Kerstin
authors: K
authors: Roback
mesh_terms: D006801:Humans; D019300:Medical Errors / Q000517:prevention & control; D033262:Narration; D010043:Outcome and Process Assessment, Health Care / Q000379:methods*; D061214:Patient Safety / Q000331:legislation & jurisprudence / Q000592:standards; D011785:Quality Assurance, Health Care / Q000379:methods*; D017751:Safety Management / Q000458:organization & administration; D013548:Sweden