{HEAD ~ The compositions} can be injected into {TAIL ~ a patient} and polymerized in situ or can be polymerized ex vivo and implanted 
injected into
{ HEAD ~ The compositions } can be injected into { TAIL ~ a patient } and polymerized in situ or can be polymerized ex vivo and implanted
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH