Xenotransplantation.
D000818:Animals; D006224:Cricetinae; D005260:Female; D006084:Graft Rejection; D016027:Heart Transplantation; D006801:Humans; D008252:Macaca fascicularis; D008297:Male; D008647:Mesocricetus; D010215:Papio; D051381:Rats; D011919:Rats, Inbred Strains; D013154:Spleen / Q000502:physiology; D014183:Transplantation, Heterologous