Study: field split over use of contract services.
Souhrada
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D001291:Attitude of Health Personnel; D003284:Contract Services / Q000706:statistics & numerical data*; D003625:Data Collection; D005069:Evaluation Studies as Topic; D006740:Hospital Administrators / Q000706:statistics & numerical data; D006748:Hospital Departments / Q000458:organization & administration*; D014481:United States