Beta galactosidase:PrThr:Pt:Amnio fld cells:Ord
beta galactosidase:prthr:pt:amnio fld cells:ord
Beta galactosidase:Presence or Threshold:To identify measures at a point in time:Amniotic fluid cells:Ordinal
beta galactosidase:presence or threshold:to identify measures at a point in time:amniotic fluid cells:ordinal