title: Britain plays it cautious on animal-human transplants.
mesh_terms: D026683:Advisory Committees; D032761:Animal Experimentation; D000818:Animals; D002986:Clinical Trials as Topic; D004992:Ethics, Medical; D033161:Government Regulation; D016027:Heart Transplantation; D006801:Humans; D012192:Retroviridae Infections / Q000635:transmission*; D013552:Swine; D014183:Transplantation, Heterologous; D006113:United Kingdom