title: Guidance on xenotransplantation sought.
mesh_terms: D000818:Animals; D006801:Humans; D017410:Practice Guidelines as Topic; D012307:Risk Factors; D012449:Safety; D014183:Transplantation, Heterologous / Q000009:adverse effects / Q000639:trends*; D014481:United States; D014486:United States Food and Drug Administration