title: Reproducibility of measurements of trace gas concentrations in expired air.
authors.forename: L H
authors.initials: LH
authors.lastname: Hamilton
mesh_terms: D001944:Breath Tests; D002245:Carbon Dioxide / Q000032:analysis; D005740:Gases / Q000032:analysis*; D006801:Humans; D006859:Hydrogen / Q000032:analysis; D007422:Intestines / Q000502:physiology; D008697:Methane / Q000032:analysis; D015203:Reproducibility of Results
chemical_list: D005740:Gases; D002245:Carbon Dioxide; D006859:Hydrogen; D008697:Methane