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