title: FDA halts all gene therapy trials at Penn.
authors.forename: E
authors.initials: E
authors.lastname: Marshall
mesh_terms: D000046:Academic Medical Centers; D000818:Animals; D002986:Clinical Trials as Topic; D035082:Federal Government; D015316:Genetic Therapy; D033161:Government Regulation; D000882:Haplorhini; D006801:Humans; D007258:Informed Consent; D010414:Pennsylvania; D035842:Research Subjects; D014481:United States; D014486:United States Food and Drug Administration