title: Ethical questions of tissue transplant.
authors: J
authors: J
authors: Palca
mesh_terms: D004992:Ethics, Medical; D005333:Fetus; D006801:Humans; D009474:Neurons / Q000637:transplantation*; D010300:Parkinson Disease / Q000628:therapy*; D014481:United States; D014483:United States Dept. of Health and Human Services