Your answer James;
"The repair and regeneration of tissues using endogenous stem cells represents an ultimate goal in regenerative medicine," the team says.
So no rejection is likely as they are using the patients own cells.
This is exciting just as the Russians had a ship since 1978 equipped to travel the world doing eye surgery for many who could not otherwise contemplate it, many relying on free glasses from charities like Oxfam.
There is little or no reason why such a ship or ships could not be funded by the UN to do the same with this technology in the future.