title: Comment on "Xeno's paradox".
authors: Rui
authors: R
authors: Sousa
mesh_terms: D006801:Humans; D016377:Organ Transplantation / Q000941:ethics / Q000331:legislation & jurisprudence; D014019:Tissue Donors / Q000600:supply & distribution*; D009927:Tissue and Organ Procurement / Q000941:ethics / Q000331:legislation & jurisprudence