Use of the emergency department by patients with nonurgent conditions.
D000293:Adolescent; D000328:Adult; D004636:Emergency Service, Hospital / Q000706:statistics & numerical data*; D005260:Female; D006296:Health Services; D006300:Health Services Misuse; D006801:Humans; D007087:Illinois; D007389:Internal-External Control; D008016:Life Change Events; D008297:Male; D008875:Middle Aged; D011581:Psychological Tests; D013315:Stress, Psychological