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