Alpha-1-Fetoprotein:PrThr:Pt:Amnio fld:Ord
alpha-1-fetoprotein:prthr:pt:amnio fld:ord
Alpha-1-Fetoprotein:Presence or Threshold:To identify measures at a point in time:Amniotic fluid:Ordinal
alpha-1-fetoprotein:presence or threshold:to identify measures at a point in time:amniotic fluid:ordinal