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The list is widely recognized as one of the most rigorous independent measures of scientific impact. Researchers are scored using six citation-based metrics, including total citations, h-index, and co-authorship-adjusted indicators, and ranked across 22 scientific fields and 174 sub-fields. Scientists must rank in the top 2% of their sub-field, or within the top 100,000 researchers globally, to be included.

The list is published in two versions: one measuring career-long impact across a researcher's full body of published work, and one reflecting impact in the past year, highlighting research that is drawing the most attention right now.

Three VBRI investigators earned recognition on both lists, a distinction that reflects both a lifetime of consequential research and work that continues to shape the field today:

• Brian Curtis, PhD, D(ABMLI), MT(ASCP) SBB 
  Senior Director, Diagnostic Hematology
  Senior Investigator, Hematology
• Alan E. Mast, MD, PhD
  Senior Investigator and Program Co-Leader, Thrombosis and Hemostasis
  Walter Schroeder Endowed Chair for Blood Research
• Roy Silverstein, MD 
  Senior Investigator, Transfusion Medicine, Vascular Biology & Cell Therapy

Two investigators were recognized for the breadth and staying power of their contributions across their careers:

• Bonnie N. Dittel, PhD 
  Senior Investigator, Hematopoiesis and Immunology
  Dr. Gilbert C. White II Endowed Faculty Chair
• Peter J. Newman, PhD 
  Senior Investigator, Transfusion Medicine, Vascular Biology & Cell Therapy
  Jacquelyn Fredrick Endowed Chair for Foundational Research

Three investigators were recognized for their impact in the most recent year of the ranking, reflecting research that is actively shaping science and standards of care:

• Lisa Baumann Kreuziger, MD, MS 
  Senior Investigator and Program Leader, Translational Hematology
  Senior Medical Director, Hematology
• Karin Hoffmeister, MD 
  Senior Investigator, Interim Co-Director, and Executive Director for Research, Transfusion Medicine, Vascular Biology & Cell Therapy
  Hauske Family Endowed Chair in Glycobiology
• Subramaniam Malarkannan, PhD 
  Senior Investigator, Hematopoiesis and Immunology
  Gardetto Chair for Immunology and Immunotherapy

The reach of VBRI's science extends well beyond its Milwaukee campus. Citations are, at their core, show when another scientist, somewhere in the world, finds that the work done at VBRI is indispensable to the work they are doing

VBRI’s work spans basic, translational, and clinical research in hematology, with investigators focused on everything from blood clotting disorders and platelet biology to immune regulation, glycobiology, and transfusion medicine. When that science is cited by peers at institutions around the world, it is evidence that the questions being asked here — and the answers that follow — matter to the field.

The Versiti Blood Research Institute is dedicated to advancing hematology through basic, translational, and clinical research. Located on the Milwaukee Regional Medical Center campus alongside the Medical College of Wisconsin, Froedtert Hospital, and Children's Wisconsin, VBRI provides investigators with state-of-the-art facilities and specialized core services to accelerate discovery. For more information, visit investinhope.versiti.org.