title: Medical research. Regulators grapple with an unorthodox therapy.
authors.forename: Jop
authors.initials: J
authors.lastname: de Vrieze
mesh_terms: D016360:Clostridioides difficile; D000529:Complementary Therapies / Q000379:methods*; D004761:Enterocolitis, Pseudomembranous / Q000628:therapy; D005243:Feces / Q000382:microbiology*; D005260:Female; D006801:Humans; D014180:Transplantation; D014481:United States; D014486:United States Food and Drug Administration