ii) {HEAD ~ at least one monomer} or macromer containing {TAIL ~ at least one free radical polymerizable group}, wherein at least one of the monomers or macromers includes an anhydride linkage 
containing
ii ) { HEAD ~ at least one monomer } or macromer containing { TAIL ~ at least one free radical polymerizable group } , wherein at least one of the monomers or macromers includes an anhydride linkage
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH