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Created page with "Kleine–levin syndrome (kls) is a rare neurological disorder characterized by episodes of excessive sleep and altered behavior. During an episode, a person with kls may sleep for most of the day and night, and have a decreased appetite and difficulty with memory and concentration. Kls is most commonly diagnosed in males during adolescence and can last for several days to several months. The cause of kls is unknown, but it is thought to be related to changes in the hypot..."