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