1. https://www.cms.gov/Medicare/End-Stage-Renal-Disease/ESRDNetworkOrganizations/Downloads/ESRDNWBackgrounder-Jun12.pdf
2. U.S. Department of Health and Human Services https://www.cms.gov/Research-Statistics-Data-and-Systems/Statistics-Trends-and-Reports/CMS-Statistics-Reference-Booklet/Downloads/CMS_Stats_2014_final.pdf
3. https://www.cms.gov/Medicare/CMS-Forms/CMS-Forms/downloads/cms2728.pdf
4. https://www.dialysisdata.org/sites/default/files/content/Methodology/SMRDocumentation.pdf