title: Temporary halt on gene therapy trials.
mesh_terms: D041321:Chromosomes, Human, X; D002986:Clinical Trials as Topic; D008040:Genetic Linkage; D015316:Genetic Therapy / Q000009:adverse effects*; D006801:Humans; D016511:Severe Combined Immunodeficiency / Q000235:genetics / Q000628:therapy*; D014481:United States; D014486:United States Food and Drug Administration