Methane/Expired gas^1H post dose lactose PO:VFr:Pt:Exhl gas:Qn
methane/expired gas^1h post dose lactose po:vfr:pt:exhl gas:qn
Methane/Expired gas^1H post dose lactose PO:VFr:Pt:Exhl gas:Qn
methane/expired gas^1h post dose lactose po:vfr:pt:exhl gas:qn