Sensory immobilization testing and polysomnogram testing are useful research tools for restless legs syndrome Sensory immobilization testing and polysomnogram testing are useful research tools for restless legs syndrome Download Restless legs syndrome: diagnostic criteria, special considerations, and epidemiology: A report from the restless legs syndrome diagnosis and epidemiology workshop at the National Institutes of Health The Johns Hopkins telephone diagnostic interview for the restless legs syndrome: preliminary investigation for validation in a multi-center patient and control population