Examples of active agents include {TAIL ~ a paramagnetic element}, a radioactive element and {HEAD ~ a fibrinolytic agent}, among others 
Examples of active agents include { TAIL ~ a paramagnetic element } , a radioactive element and { HEAD ~ a fibrinolytic agent } , among others
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH