{HEAD ~ A method} 1, which comprises detecting {TAIL ~ enhanced aggregation} of the platelets in the presence of a multivalent ion 
comprises detecting
{ HEAD ~ A method } 1 , which comprises detecting { TAIL ~ enhanced aggregation } of the platelets in the presence of a multivalent ion
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH