Technical Director, Highland Park and Glenbrook Laboratories
Director, Point of Care Testing


  • American Board of Bioanalysis – ABB (HCLD)

University Appointment

  • Clinical Assistant Professor of Pathology, University of Chicago Pritzker School of Medicine

Education and Training

  • 1980, Loyola University of Chicago PhD, Biochemistry


  • Rosecrans R, Dohnal JC: Seasional vitamin D changes and the impact on health risk assessment.  Clin Biochem 2014 May; 47(7-8):670-2.
  • Rosecrans R and Dohnal J: The Effect of Complimentary and Alternative Medicine (CAM) Products on Laboratory Testing.  Semin Diagn Pathol 2009 Feb; 26(1):38-48.


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