Correspondence| Volume 22, ISSUE 7, P928, July 1987

Ultradian sleep rhythms and cortisol

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        • Born J
        • Kern W
        • Bieber K
        • Fehm-Wolfsdorf G
        • Schiebe M
        • Fehm HL
        Night-time plasma cortisol secretion is associated with specific sleep stages.
        Biol Psychiatry. 1986; 21: 1415-1424
        • Kripke DF
        Ultradian rhythms in sleep and wakefulness.
        in: Advances in Sleep Research. vol I. Spectrum Publications, New York1974: 305-325