title: [Questioning about rationality and necessity of the concepts of healthcare-associated pneumonia].
authors.forename: Tie-mei
authors.initials: TM
authors.lastname: Zhao
authors.forename: You-ning
authors.initials: YN
authors.lastname: Liu
mesh_terms: D003428:Cross Infection; D003695:Delivery of Health Care; D006801:Humans; D011014:Pneumonia