Quality Control Measures over 30 Years in a Multicenter Clinical Study: Results from the Diabetes Control and Complications Trial / Epidemiology of Diabetes Interventions and Complications (DCCT/EDIC) Study

• Gayle M. Lorenzi ,

  Contributed equally to this work with: Gayle M. Lorenzi, Barbara H. Braffett

  * E-mail: glorenzi@ucsd.edu

  Affiliation Department of Medicine, University of California San Diego, La Jolla, California, United States of America

  ⨯
• Barbara H. Braffett ,

  Contributed equally to this work with: Gayle M. Lorenzi, Barbara H. Braffett

  Affiliation The Biostatistics Center, George Washington University, Rockville, Maryland, United States of America

  ⨯
• Valerie L. Arends ,

  ¶‡ These authors also contributed equally to this work.

  Affiliation Department of Laboratory Medicine and Pathology, University of Minnesota, Minneapolis, Minnesota, United States of America

  ⨯
• Ronald P. Danis ,

  ¶‡ These authors also contributed equally to this work.

  Affiliation Department of Ophthalmology and Visual Sciences, University of Wisconsin, Madison, Wisconsin, United States of America

  ⨯
• Lisa Diminick ,

  ¶‡ These authors also contributed equally to this work.

  Affiliation The Biostatistics Center, George Washington University, Rockville, Maryland, United States of America

  ⨯
• Kandace A. Klumpp ,

  ¶‡ These authors also contributed equally to this work.

  Affiliation The Biostatistics Center, George Washington University, Rockville, Maryland, United States of America

  ⨯
• Anthony D. Morrison ,

  ¶‡ These authors also contributed equally to this work.

  Affiliation Department of Medicine, University of South Florida, Tampa, Florida, United States of America

  ⨯
• Elsayed Z. Soliman ,

  ¶‡ These authors also contributed equally to this work.

  Affiliation Department of Epidemiology and Prevention, Wake Forest School of Medicine, Winston Salem, North Carolina, United States of America

  ⨯
• Michael W. Steffes ,

  ¶‡ These authors also contributed equally to this work.

  Affiliation Department of Laboratory Medicine and Pathology, University of Minnesota, Minneapolis, Minnesota, United States of America

  ⨯
• Patricia A. Cleary ,

  ¶‡ These authors also contributed equally to this work.

  Affiliation The Biostatistics Center, George Washington University, Rockville, Maryland, United States of America

  ⨯
• the DCCT/EDIC Research Group

  ¶Membership of the DCCT/EDIC Research Group is listed in the Acknowledgments.

  ⨯