title: Gangs and hospitals: guarding against inside and outside threats.
mesh_terms: D000293:Adolescent; D002641:Chicago; D006786:Hospitals, Urban / Q000458:organization & administration*; D006801:Humans; D007604:Juvenile Delinquency / Q000517:prevention & control*; D012637:Security Measures; D014754:Violence / Q000517:prevention & control*