title: Exhaled nitric oxide in difficult childhood asthma: more light or still chasing shadows?
authors.forename: S M
authors.initials: SM
authors.lastname: Stick
mesh_terms: D001249:Asthma / Q000378:metabolism* / Q000503:physiopathology; D002648:Child; D006801:Humans; D009569:Nitric Oxide / Q000378:metabolism*; D019001:Nitric Oxide Synthase / Q000378:metabolism; D012119:Respiration
chemical_list: D009569:Nitric Oxide; D019001:Nitric Oxide Synthase