The invention provides several methods of inducing tolerance to foreign antigens, e.g., to {HEAD ~ antigens} on {TAIL ~ allogeneic or xenogeneic tissue} or organ grafts 
on
The invention provides several methods of inducing tolerance to foreign antigens , e.g. , to { HEAD ~ antigens } on { TAIL ~ allogeneic or xenogeneic tissue } or organ grafts
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH