Calum A. MacRae, MD, PhD, is a Professor of Medicine at Harvard Medical School, the PI of the Apple Health Study, Director of One Brave Idea (a biomedical innovation program founded by the American Heart Association, Verily and AstraZeneca with additional support from Quest Diagnostics), a Principal Faculty Member at the Harvard Stem Cell Institute, and an Associate Member at the Broad Institute of Harvard and MIT. He is a co-founder of Tanaist, an AI-driven deep phenotyping company, and of Atman Health which is creating fully autonomous ambulatory care.