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Institutional Change and the Transformation of Interorganizational Fields: An Organizational History of the U.S. Radio Broadcasting ...Understanding the minimum clinically important difference: a review of concepts and methods.Minimum clinically important difference in lumbar spine surgery patients: a choice of methods using the Oswestry Disability Index, M...124. The Minimum Clinically Important Difference in Lumbar Spine Surgery Patients: A Choice of Methods Using the Oswestry Disability...Institutional Change and the Transformation of the U.S. Radio Broadcasting IndustryA benefit-based copay for prescription drugs: patient contribution based on total benefits, not drug acquisition cost.Police academy fitness training at the Police Training Institute, University of IllinoisEffect of a Three-Tier Prescription Copay on Pharmaceutical and Other Medical UtilizationDefining substantial clinical benefit following lumbar spine arthrodesis.Method and apparatus for delivering a pharmaceutical prescription copay counselor over an internet protocol network