title: Profile: Daniel Callahan.
authors.forename: Stephan
authors.initials: S
authors.lastname: Herrera
mesh_terms: D001675:Bioethics / Q000266:history*; D001709:Biotechnology / Q000941:ethics* / Q000266:history*; D004994:Ethics, Pharmacy / Q000266:history*; D049673:History, 20th Century; D049674:History, 21st Century