1. CHU Bichat Claude Bernard, APHP, Service de Gériatrie, Paris, France
2. Université Paris Descartes, INSERM, Paris, France
3. Center for Sleep and Circadian Neurobiology and Division of Sleep Medicine, School of Medicine, University of Pennsylvania, Philadelphia, PA
4. Division of Geriatric Medicine, School of Medicine, University of Pennsylvania, Philadelphia, PA
5. Hôpital Eduard Herriot, Centre Gériatrique de Médecine du Sommeil, Lyon, France