LeechesHirudinsHirudo medicinalisSubstance PThrombinLeechingAntithrombinsPartial Thromboplastin TimeFibrinopeptide ASubstance-Related DisordersGangliaGanglia, InvertebrateHeparinFibrinopeptide BRecombinant ProteinsInvertebrate HormonesReceptors, ThrombinAmino Acid SequenceReceptors, Neurokinin-1Substance Abuse Treatment CentersAntithrombin IIIMolecular Sequence DataFibrinolytic AgentsBlood Coagulation