{HEAD ~ The present invention} provides a method of measuring the activity of a substance to test how it inhibits or promotes the production of {TAIL ~ the blood coagulation factor} XII in an active form  
{ HEAD ~ The present invention } provides a method of measuring the activity of a substance to test how it inhibits or promotes the production of { TAIL ~ the blood coagulation factor } XII in an active form
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH