| http://www.w3.org/ns/prov#value | - Morning types go to bed early and function best in the early daytime hours, whereas evening types go to bed in the early morning hours and function best at later times in the day or evening.2 Twin and molecular genetic studies consistently show that diurnal preference is influenced by genetic factors, with heritability between 40% and 54%.3???12Recent research has focused on the role of circadian
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