 She has campaigned against the use of non-human primates in xenotransplantation, where pig organs were grafted onto the necks of primates to test anti-rejection drugs.She told medical journalists Jenny Bryan and John Clare that the primates used in xenotransplantation research are subjected to major surgery; internal haemorrhages; isolation in small cages; repeated blood sampling; wound infections; nausea, vomiting and diarrhoea because of immunosuppressant drugs; kidney or heart failure, and eventually death.She said