title: [Exacerbation phenotyping in chronic obstructive pulmonary disease].
authors: Email: hx399@163.com.
authors: Yulin
authors: Y
authors: Feng
authors: Xuemei
authors: X
authors: Ou
authors: Yongjiang
authors: Y
authors: Tang
mesh_terms: D006801:Humans; D029424:Pulmonary Disease, Chronic Obstructive / Q000175:diagnosis* / Q000628:therapy*