Hydrogen+Methane/Expired gas^pre dose lactose PO:VFr:Pt:Exhl gas:Qn
hydrogen+methane/expired gas^pre dose lactose po:vfr:pt:exhl gas:qn
Hydrogen+Methane/Expired gas [Volume Fraction] in Exhaled gas --pre dose lactose PO
hydrogen+methane/expired gas [volume fraction] in exhaled gas --pre dose lactose po