Investigator, Howard Hughes Medical Institute, Professor of Pediatrics, University of Iowa

Stanford University School of Medicine

MBS, Radboud University Medical Centre

University of Pennsylvania

Professor Emeritus, University of Illinois Urbana-Champaign

Brigham and Women's Hospital, Harvard Medical School

UT, Austin

Chair, Dept of Biochemistry, University of California, San Francisco

The Catholic University of America

Simon Fraser University