Author Contributions: Dr Sehgal had full access to all of the data in the study and takes responsibility for the integrity of the data and the accuracy of the data analysis.
Study concept and design: Sullivan, Sayre, Leon, Sehgal.
Acquisition of data: Sullivan, Sayre, Porter.
Analysis and interpretation of data: Sullivan, Sayre, Leon, Machekano, Love, Porter, Marbury, Sehgal.
Drafting of the manuscript: Sehgal.
Critical revision of the manuscript for important intellectual content: Sullivan, Sayre, Leon, Machekano, Love, Porter, Marbury.
Statistical analysis: Sullivan, Machekano, Love, Porter, Sehgal.
Obtained funding: Leon, Sehgal.
Administrative, technical, or material support: Sullivan, Sayre, Leon, Porter, Marbury, Sehgal.
Study supervision: Sullivan, Leon, Sehgal.
Financial Disclosures: None reported.
Funding/Support: This work was supported by grant DK51472 from the National Institute of Diabetes and Digestive and Kidney Diseases, Bethesda, Maryland, and by the Leonard C. Rosenberg Renal Research Foundation, Cleveland, Ohio.
Role of the Sponsor: The funding organizations had no role in the design and conduct of the study; collection, management, analysis, and interpretation of the data; or preparation, review, or approval of the manuscript.
Additional Contributions: We are grateful to the patients and dialysis facilities who participated in this project.