Interview surveys (Gilleard et al., 1984; Karacan et al., 1983; McGhie and Russell, 1962; Morgan et al., 1988) of inhabitants in certain areas in foreign countries have showed an increased in the number of people who are aware of insomnia with age and frequent use of hypnotics, However in Japan, there are few such surveys.
KeywordsAged Subject Sleep Onset Temperature Rhythm Young Adult Group Deep Body Temperature
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