C3 nephritic factor:PrThr:Pt:Ser/Plas:Ord
c3 nephritic factor:prthr:pt:ser/plas:ord
C3 nephritic factor:Presence or Threshold:To identify measures at a point in time:Serum/Plasma:Ordinal
c3 nephritic factor:presence or threshold:to identify measures at a point in time:serum/plasma:ordinal