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