Thus, {HEAD ~ cells} embedded in this enhanced hydrogel matrix substantially escape {TAIL ~ host immune destruction} 
substantially escape
Thus , { HEAD ~ cells } embedded in this enhanced hydrogel matrix substantially escape { TAIL ~ host immune destruction }
OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL