Psychiatric emergencies in the emergency department.
D004636:Emergency Service, Hospital / Q000458:organization & administration*; D004637:Emergency Services, Psychiatric / Q000458:organization & administration*; D006749:Hospital Design and Construction; D006801:Humans; D001523:Mental Disorders / Q000628:therapy*; D008605:Mental Health Services / Q000458:organization & administration*; D012017:Referral and Consultation; D014481:United States