OXFORD - European parliamentarians last Friday called for a worldwide moratorium on xenotransplantation until the technology - which uses animal parts for human transplants - is evaluated and guidelines established.

"The risks involved in allowing xenotransplantation in clinics is currently too high to be acceptable. Much more research is needed before we will have satisfactorily answered all the unanswered questions," Jean-Francois Mattei of France told the Council of Europe's parliamentary assembly.