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