Columbia subject headings:
Procurement of organs, tissues, etc.--Moral and ethical aspects.
Transplantation of organs, tissues, etc.--Complications.
Transplantation of organs, tissues, etc.--Moral and ethical aspects.
Xenografts--Moral and ethical aspects.
Zoonoses.
Harvard subject headings:
Medical ethics.
Procurement of organs, tissues, etc.--Moral and ethical aspects.
Transplantation of organs, tissues, etc.--Moral and ethical aspects
Xenografts--Moral and ethical aspects.
Xenografts.
Princeton subject headings: