title: [The progress of clinical application of fractional exhaled nitric oxide testing in children 5 years and younger].
authors.forename: Zhe
authors.initials: Z
authors.lastname: Yang
authors.forename: Yan
authors.initials: Y
authors.lastname: Xing
authors.affiliation: Email: liuchcip@126.com.
authors.forename: Chuanhe
authors.initials: C
authors.lastname: Liu
mesh_terms: D001944:Breath Tests; D002675:Child, Preschool; D045853:Exhalation; D006801:Humans; D009569:Nitric Oxide / Q000032:analysis*
chemical_list: D009569:Nitric Oxide