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