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In a randomized clinical trial, researchers at the Department of Otolaryngology–Head and Neck Surgery, Washington University School of Medicine, explored visual-olfactory training with patients who have had loss of smell with COVID-19. Participants were randomized into 1 of 4 intervention arms: visual-olfactory training with patient-preferred scents, visual-olfactory training with physician-assigned scents, olfactory training with patient-preferred scents, and olfactory training with
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