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Scientific Advisory Board

Bergein F. Overholt, M.D., Chairman

  • Developer of the flexible fiberoptic sigmoidoscope and colonoscope.
  • Established the first endoscopic ambulatory surgery center in the USA.
  • Developed photodynamic therapy for Barrett’s esophagus.
  • Awarded Mastership by the American College of Physicians & American College of Gastroenterology.
  • Past President American Society of Gastrointestinal Endoscopy.

Herbert A. Fritsche, Ph.D.

  • Retired, Tenured Professor & Chief of Clinical Chemistry; MD Anderson Cancer Center (1969-2010).
  • Over 200 peer reviewed manuscripts, book chapters & invited articles. Holder of five patents.
  • Member of Editorial Board for 12 scientific journals & coeditor of book “Tumor Markers” AACC Press.
  • Member Tumor Marker Guideline Committees for ASCO and Natl Academy for Clinical Biochemistry.
  • Awards: Johnson & Johnson –Outstanding Research Contributions; AACC Morton Schwartz-Research in Cancer Diagnostics; Carl Jolliff and Morton Schwartz Lifetime Achievement Awards in Immunology and Cancer.

Tommye Jordan

  • Originally discovered CA11-19 tumor marker and Principal Investigator on National Cancer Institute Grant # R43CA36650-01A1 for the development of the tumor marker ELISA presently trademarked ColoMarker.
  • Served as Vice President of Research and Development  at EDP Biotech from 2005-2016.
  • Established and served as President of JCL Clinical Research Corporation and Concepto Diagnostics from 1971-2005.
  • Developed the first commercial immunoassay for Erythropoietin.
  • Authored over 45 peer reviewed publications – including 13 publications on the ColoMarker technology.
  • American Society of Clinical Pathology Scientific Award 1969.
  • Holds 2 patents in the Immunology Assay field.
  • University of Tennessee graduate, ASCP Medical Technologist of 53 years.

John J. Costanzi, M.D.

  • Internationally known in field of Oncology- leading expert in treatment of cancer.
  • Authored over 150 peer review articles, 10 book chapters and 2 books on Oncology.
  • Retired Director of Lone Star Oncology.
  • Director of Cancer Center at University of Texas Medical Branch, Galveston.
  • Director in start up of Thompson Cancer Center, Knoxville, TN.
  • AF Scientist of Year, SMA Outstanding Career in Research.

Donald J. Wheeler, Ph.D.

  • Internationally recognized expert on Data Analysis.
  • Author/co-author of 25 books and over 250 articles.
  • Fellow American Statistical Association.
  • Fellow American Society for Quality.
  • Awarded the Deming Medal in 2010.

Walter R. Threlfall, D.V.M., M.S., Ph.D., D.A.C.T.

  • Vice President of the American Veterinary Medical Association.
  • Consulting Theriogenologist and Professor Emeritus at The Ohio State University, Department of Veterinary Clinical Sciences.
  • Governor’s appointee to the Public Health State Committee in Ohio.
  • Past President of the American College of Theriogenologists.
  • Author of 80 sceintific articles and more than 50 chapters in numerous textbooks.