Assertion: narcolepsy's symptom | /r/HasProperty | described above sleep paralysis
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Source sentences:
text: Without cataplexy, the symptoms described above (i.e., excessive daytime sleepiness, sleep paralysis, hypnagogic/hypnopompic hallucinations) may be seen in any individual who is sleep deprived as well as in other sleep-related disorders; therefore, confirmatory studies must be performed in order to establish the diagnosis.