Hydrogen/Expired gas^post 10 g lactulose PO:VFr:Pt:Exhl gas:Qn
hydrogen/expired gas^post 10 g lactulose po:vfr:pt:exhl gas:qn
Hydrogen/Expired gas [Volume Fraction] in Exhaled gas --post 10 g lactulose PO
hydrogen/expired gas [volume fraction] in exhaled gas --post 10 g lactulose po