{HEAD ~ The transplant} comprises {TAIL ~ cells} having outer surfaces encapsulated by a matrix comprising an effective amount of polar amino acids 
comprises
{ HEAD ~ The transplant } comprises { TAIL ~ cells } having outer surfaces encapsulated by a matrix comprising an effective amount of polar amino acids
HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH