30 Sept. 1999. A grandmother who had lived with an unusual sleep pattern all her life was troubled to see her daughter and grandchild experiencing the same tendency to go to sleep and wake up several hours earlier than normal. Her doctor suspected a genetic cause and worked with a geneticist at the University of Utah Department of Human Genetics to investigate. A short-period circadian rhythm variant in humans. Subscription required to access article on website.
Researchers link gene to sleeping.
31 August, 1999. Genetic Link Found to Extreme Sleep Behavior. Salt Lake Tribune. 31 August, 1999.