Adjusting to night shifts is linked to longer REM sleep

Declaration of conflicts of interest Iona Zimberg, Suzanne Ftouni and Michelle Magee have no conflicts of interest to disclose. Sally Ferguson reports that through her institution she has received research grants from SafeWorkSA, Sleep Health Foundation; Australian Research Council, Australian Government Department of Industry, Innovation and Science; Defence, Science and Technology Organisation, Australian Maritime Safety Authority and Queensland Health. Steven Lockley has no conflicts of interests related to the research or results reported in this paper. In the interests of full disclosure, commercial interests are listed below. SWL has received consulting fees from the Atlanta Falcons, Atlanta Hawks, BHP Billiton, Noble Insights, Slingshot Insights and Team C Racing; honoraria and/or paid travel from BHP Billiton, DIN, Emory University, IES, Ineos, SLTBR, Solemma and Teague; has current consulting contracts with Akili Interactive, Apex2100 Ltd, Consumer Sleep Solutions, Headwaters Inc, Hintsa PERformance AG, LightCognitive, Lighting Science Group Corporation, Mental Workout, PlanLED, Six Senses, Stantec and Wyle Integrated Science and Engineering; has received unrestricted equipment gifts from Bionetics Corporation and F. Lux Software LLC and royalties from Oxford University Press; and has served as a paid expert in legal proceedings related to light, sleep and health. He holds a patent through Harvard University and Brigham and Women's Hospital for “Systems and Methods for Determining and/or Controlling Sleep Quality.” Shantha Rajaratnam reports unpaid appointments at the Cooperative Research Centre for Alertness, Safety and Productivity, Australia and the Sleep Health Foundation. Dr. Rajaratnam is supported on grants from Vanda Pharmaceuticals, Philips Respironics, Cephalon, Rio Tinto, BHP Billiton and Shell. Dr. Rajaratnam has received other support from Optalert, Compumedics, Teva Pharmaceuticals and Circadian Therapeutics, through his institution. He is a member of the National Sleep Foundation Sleep Timing Variability Consensus Panel, for which he was paid an honorarium through his institution. Tracey Sletten reports her institution has received equipment donations or other support from Philips Lighting, Philips Respironics, Optalert and Compumedics. Dr. Sletten was a Project Leader and received grants for research from the Cooperative Research Centre for Alertness, Safety and Productivity. Dr. Sletten has received consulting fees from Vanda Pharmaceuticals and is a member of the National Sleep Foundation Sleep Timing Variability Consensus Panel, for which she was paid an honorarium.