title: Do low exhaled condensate NH4+ concentrations in asthma reflect reduced pulmonary production?
authors.forename: Richard M
authors.initials: RM
authors.lastname: Effros
mesh_terms: D001249:Asthma / Q000378:metabolism*; D001944:Breath Tests; D006801:Humans; D008168:Lung / Q000378:metabolism*; D000644:Quaternary Ammonium Compounds / Q000378:metabolism*
chemical_list: D000644:Quaternary Ammonium Compounds