Hydrogen/Expired gas^2.25H post XXX challenge:VFr:Pt:Exhl gas:Qn
hydrogen/expired gas^2.25h post xxx challenge:vfr:pt:exhl gas:qn
Hydrogen/Expired gas [Volume Fraction] in Exhaled gas --2.25 hours post XXX challenge
hydrogen/expired gas [volume fraction] in exhaled gas --2.25 hours post xxx challenge