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.
Example solution: Ventricular Fibrillation
Example explanation: 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.

Problem: Abstract: From six extended-care facilities, 306 employees responded to a questionnaire on perceived life-style. Most respondents were female, married, and under age 35. The majority had had recent blood pressure checks, seldom missed work because of infections, made time for leisure activities, and felt secure in their jobs. Overall, the percentage of smokers was slightly below the national average, but 45% of the technical employees smoked. Perception of overweight and skipped meals increased with level of education. Consumption of fried foods and sweets decreased with the level of education while fiber intake increased. More skilled and technical employees than professional employees consumed milk products. Less than half of any employee group consumed excessive amounts of coffee or colas. Few study participants consumed alcohol. Very few members of any group consumed meals away from home five or more times per week. Less than half of all employees believed that they received enough exercise; one-third or less exercised regularly. A greater percentage of technical employees than of the other two employee groups expressed interest in improving health through physical fitness and class sessions.

Solution: Adult