Hydrogen/Expired gas^5H post XXX challenge:VFr:Pt:Exhl gas:Qn
hydrogen/expired gas^5h post xxx challenge:vfr:pt:exhl gas:qn
Hydrogen/Expired gas^5 hours post XXX challenge:Volume Fraction:To identify measures at a point in time:Exhaled gas (breath):Quantitative
hydrogen/expired gas^5 hours post xxx challenge:volume fraction:to identify measures at a point in time:exhaled gas (breath):quantitative