Once-Nightly Sodium Oxybate for Treatment of Excessive Daytime Sleepiness and Cataplexy in Narcolepsy • Observational Study to Evaluate Risks of Side Effects, Drug Abuse and Dependence in Patients Who Received Xyrem ® on Prescription • A Study of the Efficacy and Safety of JZP-258 in Subjects With Narcolepsy With Cataplexy