Columbia subject headings:
Epidemiology.
Mental illness--Illinois--Chicago Metropolitan Area--Statistics.
Psychology, Pathological--Social aspects.
Harvard subject headings:
Epidemiology
Mental illness--Illinois--Chicago Metropolitan Area--Statistics.
Psychiatric epidemiology--Illinois--Chicago Metropolitan Area.
Psychology, Pathological--Social aspects
Princeton subject headings:
Epidemiology.
Mental illness--Illinois--Chicago metropolitan area--Statistics.
Psychology, Pathological--Social aspects.