Why can’t we sleep? The CDC estimates that 50 to 70 million U.S. adults have a sleep or wakefulness disorder, caused by "broad scale societal factors such as round-the-clock access to technology and work schedules, but sleep disorders such as insomnia or obstructive sleep apnea also play an important role." 

Dr. Rafael Pelayo, Clinical Professor, Psychiatry and Behavioral Sciences at the Stanford Center for Sleep Sciences and Medicine, joins us for this week's Please Explain about insomnia and sleep disorders. 

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