title: The Johns Hopkins Institutions.
authors.forename: D
authors.initials: D
authors.lastname: Nathans
authors.forename: J A
authors.initials: JA
authors.lastname: Block
authors.forename: M M
authors.initials: MM
authors.lastname: Johns
mesh_terms: D000046:Academic Medical Centers / Q000458:organization & administration*; D015142:Baltimore; D006785:Hospitals, University / Q000458:organization & administration*; D012577:Schools, Medical / Q000458:organization & administration*