[On a new principle in the treatment of chronic sleep disorders: paradoxal medication].
D002908:Chronic Disease; D006296:Health Services; D008774:Methylphenidate / Q000628:therapy*; D012890:Sleep; D012893:Sleep Wake Disorders / Q000628:therapy*
D008774:Methylphenidate
METHYLPHENIDYLACETATE/therapy; SLEEP DISORDERS/therapy