Given the task definition, example input & output, solve the new input case.
Given an abstract, generate a keyword (a noun phrase) that best describes the focus or contribution of the paper. Such keywords can be directly from the given abstract or outside it.
Example: Abstract: Some patients converted from ventricular fibrillation to organized rhythms by defibrillation - trained ambulance technicians(EMT - Ds) will refibrillate before hospital arrival.The authors analyzed 271 cases of ventricular fibrillation managed by EMT - Ds working without paramedic back - up.Of 111 patients initially converted to organized rhythms, 19(17 % ) refibrillated, 11(58 % ) of whom were reconverted to perfusing rhythms, including nine of 11(82 % ) who had spontaneous pulses prior to refibrillation.Among patients initially converted to organized rhythms, hospital admission rates were lower for patients who refibrillated than for patients who did not(53 % versus 76 % , P = NS), although discharge rates were virtually identical(37 % and 35 % , respectively).Scene - to - hospital transport times were not predictively associated with either the frequency of refibrillation or patient outcome.Defibrillation - trained EMTs can effectively manage refibrillation with additional shocks and are not at a significant disadvantage when paramedic back - up is not available.
Output: Ventricular Fibrillation
This term is directly present in the abstract and it is one of the main topic in it. So can be chosen as the medical subject heading.

New input case for you: Abstract: Emergency department utilization by recipients of Aid to Families with Dependent Children (AFDC) in a metropolitan children's hospital was monitored during a 36-month period (July 1982 to June 1985). There were 92,495 emergency department visits recorded in this interval. During 12 months of this period (July 1983 to June 1984) a pilot program (Citicare) for AFDC recipients requiring prior authorization by the primary care physician for emergency department utilization was in effect. Emergency department census dropped dramatically and abruptly upon initiation of this program. Annual census for the targeted years reveals: 35,704 visits for the 12 months preceding this novel program, 25,543 visits for the 12 months of the program, and 31,248 visits for the 12 months following the pilot program. Total emergency department census was decreased by 23% and medical assistance utilization was decreased by 46% during the Citicare program. During the target period, self-pay clients decreased by 25%, and other categories (Champus, Hill-Burton, Crippled Children's Commission, etc.) increased by 6%. There was no corresponding decline in the number of patients admitted to the hospital through the emergency department during the monitoring period with 3,545, 3,555, and 3,922 annualized admissions respectively, for the targeted 12-month periods. These data suggest that the format of Medicaid programs can dramatically alter the utilization of emergency department services. Furthermore, the primary impact of this specific program was to decrease inappropriate emergency department use.
Output:
Aid to Families with Dependent Children