title: Rebuttal from Alexandros N. Vgontzas, Jordan Gaines, Silke Ryan and Walter T. McNicholas.
authors.affiliation: Sleep Research and Treatment Center, Department of Psychiatry, Pennsylvania State University College of Medicine, Hershey, PA, USA. avgontzas@psu.edu.
authors.forename: Alexandros N
authors.initials: AN
authors.lastname: Vgontzas
authors.affiliation: Sleep Research and Treatment Center, Department of Psychiatry, Pennsylvania State University College of Medicine, Hershey, PA, USA.
authors.forename: Jordan
authors.initials: J
authors.lastname: Gaines
authors.affiliation: Pulmonary and Sleep Disorders Unit, St. Vincent's University Hospital, Dublin and School of Medicine and Medical Science, University College, Dublin, Ireland.
authors.forename: Silke
authors.initials: S
authors.lastname: Ryan
authors.affiliation: Pulmonary and Sleep Disorders Unit, St. Vincent's University Hospital, Dublin and School of Medicine and Medical Science, University College, Dublin, Ireland.
authors.forename: Walter T
authors.initials: WT
authors.lastname: McNicholas