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Joel T. Adler, MD, MPH, Heidi Yeh, MD, James F

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1 Market Competition and Density in Liver Transplantation: Relationship to Volume and Outcomes 
Joel T. Adler, MD, MPH, Heidi Yeh, MD, James F. Markmann, MD, PhD, FACS, Louis L. Nguyen, MD, MBA, MPH, FACS  Journal of the American College of Surgeons  Volume 221, Issue 2, Pages (August 2015) DOI: /j.jamcollsurg Copyright © 2015 American College of Surgeons Terms and Conditions

2 Figure 1 Absolute Nearest Neighbor (ANN) for liver transplantation centers in Black dots represent active adult liver transplantation centers. Individual regions on the map are Donor Service Areas (DSA) categorized into single-center (green), clustered (red), random (yellow), or dispersed (blue) ANN. The ANN is derived from measurement of the distance between transplantation centers to test for the density of transplantation centers within a given DSA.13 Journal of the American College of Surgeons  , DOI: ( /j.jamcollsurg ) Copyright © 2015 American College of Surgeons Terms and Conditions


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