Dr. Chernoff has served as acting Chief Medical Officer for several start-up molecular diagnostic companies including XDx, CardioDx, and Tethys Bioscience. Previously, he was Vice President of Corporate Technology at Elan Pharmaceuticals and Medical Director of Chiron Diagnostics, where he played a pivotal role in the development of assays for HIV, HCV, HBV, and CMV. He recently spent two years as an Entrepreneur-in-Residence and one year as an Operating Partner at the venture firm TPG. Dr. Chernoff holds an MD from New York University and completed his medical training in internal medicine, rheumatology, and infectious disease at the University of California, San Francisco.