Platelet aggregation.collagen induced:PrThr:Pt:PRP:Ord
platelet aggregation.collagen induced:prthr:pt:prp:ord
Platelet aggregation.collagen induced:Presence or Threshold:To identify measures at a point in time:Platelet rich plasma:Ordinal
platelet aggregation.collagen induced:presence or threshold:to identify measures at a point in time:platelet rich plasma:ordinal