Dr Brennan Spiegel is director of Health Services Research for Cedars-Sinai, professor of medicine and public health at UCLA, and the George and Dorothy Gourrich Chair in Digital Health Ethics. He also directs the Cedars-Sinai Virtual Medicine Program, where he leads research on the mind-body connection, exploring how technologies such as virtual reality and artificial intelligence can support well-being. A pioneer in digital therapeutics and immersive medicine, Dr Spiegel has published widely on the neuropsychology of emotion, gut-brain interactions, as well as on how mental states are shaped by physical experiences. He lives in Los Angeles.