William H. Morrison is a Professor of Radiation Oncology at The University of Texas MD Anderson Cancer Center. His research focuses on radiation oncology, with specific interests in proton versus photon radiotherapy for oropharyngeal cancer, radiation biology, and the epidemiology of treatment-related toxicities. He has led a multicentre, randomised phase 3 trial comparing proton and photon therapy, published in *The Lancet*, and developed externally validated digital decision-support tools for osteoradionecrosis risk stratification. His recent work also includes neoadjuvant immunotherapy for cutaneous squamous cell carcinoma of the head and neck and carotid artery volumetry changes following unilateral radiation therapy.
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