Before revision: History The term was first coined by Mills et al in a 1978 paper describing an experiment to determine the effects of jet lag independent of an individual's behavioral cycle , though the methods involved in a constant routine date back to at least 1947.
After revision: History The term was first coined by in 1978 after it was used in an experiment to determine the effects of jet lag independent of an individual's behavioral cycle - though the methods involved in a constant routine date back to at least 1947.