title: Excessive daytime sleepiness in sleep apnea: it is not just apnea hypopnea index.
authors.forename: Alexandros N
authors.initials: AN
authors.lastname: Vgontzas
mesh_terms: D002940:Circadian Rhythm; D015897:Comorbidity; D006970:Disorders of Excessive Somnolence / Q000175:diagnosis* / Q000453:epidemiology; D006801:Humans; D009765:Obesity / Q000150:complications / Q000453:epidemiology; D012307:Risk Factors; D012891:Sleep Apnea Syndromes / Q000175:diagnosis* / Q000453:epidemiology; D020181:Sleep Apnea, Obstructive / Q000175:diagnosis* / Q000453:epidemiology; D012894:Sleep Stages