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<p>The evidence that Dr. Barry Heath was beginning to lose his hearing, like his grandfather, father and uncle before him, was getting hard for the director of Fletcher Allen’s Pediatric Intensive Care Unit to ignore. With increasing frequency, Heath, who is also a professor of pediatrics at ¶¶Òõ̽̽'s College of Medicine, was asking colleagues to repeat words during rounds, especially when background noise interfered. In social situations, friends and family were patient with him, perhaps overly so.</p>