Methane/Expired gas^2.5H post dose lactose PO:VFr:Pt:Exhl gas:Qn
methane/expired gas^2.5h post dose lactose po:vfr:pt:exhl gas:qn
Methane/Expired gas^2.5H post dose lactose PO:VFr:Pt:Exhl gas:Qn
methane/expired gas^2.5h post dose lactose po:vfr:pt:exhl gas:qn