{HEAD ~ The biological adhesive} may be, but is not limited to, {TAIL ~ a fibrin sealant} 
be
{ HEAD ~ The biological adhesive } may be , but is not limited to , { TAIL ~ a fibrin sealant }
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL