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