Prevalence, incidence, and health care utilization of patients with narcolepsy: a population-representative study-V18I6 Prevalence, incidence, and health care utilization of patients with narcolepsy: a population-representative study-V18I6 Download Cardiovascular and metabolic effects of a mandibular advancement device and continuous positive airway pressure in moderate obstructive sleep apnea: a randomized controlled trial-V18I6 The differences between daytime and nighttime heart rate variability may usefully predict the apnea-hypopnea index in patients with obstructive sleep apnea-V18I6