ATLANTA — Your watch says you had three hours of deep sleep. Should you believe it? Millions of people rely on phone apps and wearable devices like rings, smartwatches and sensors to monitor how well ...
A middle-age woman with high blood pressure and epilepsy gained 50 lb over the course of 2 years. What was the best approach to diagnosing her problem? The solution was to sleep on it, said Nancy ...
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