Cancer Ag 19-9:PrThr:Pt:Ser/Plas:Ord
cancer ag 19-9:prthr:pt:ser/plas:ord
Cancer Antigen 19-9:Presence or Threshold:To identify measures at a point in time:Serum/Plasma:Ordinal
cancer antigen 19-9:presence or threshold:to identify measures at a point in time:serum/plasma:ordinal