{HEAD ~ This matter} includes, but is not limited to, atheromatous fragments, fat, platelets, fibrin, clots, or {TAIL ~ gaseous material} 
{ HEAD ~ This matter } includes , but is not limited to , atheromatous fragments , fat , platelets , fibrin , clots , or { TAIL ~ gaseous material }
HEAD HEAD HEAD HEAD HEAD HEAD REL 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