He oversees the clinical delivery of cancer care across Stanford Medicine and regional cancer networks. He is clinically active in microvascular reconstruction of complex head and neck defects. He has published over 160 peer-reviewed scientific manuscripts, authored many book chapters and published a book on optical imaging in cancer. He leads a multidisciplinary team of scientists that have successfully performed first in human clinical trials using fluorescently labeled antibodies in the clinic and operating room. These early phase clinical trials have demonstrated that fluorescence enhancement can visualize microscopic cancer in the operating room and may significantly improve clinical outcomes.