University of Georgia Department of Kinesiology, Athens, Georgia 30602-6554, USA.

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Department of Behavioral Biology, Walter Reed Army Institute of Research, Washington, DC, USA.

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Sleep Medicine and Research Center affiliated with St. John's Mercy Medical Center and St. Luke s Hospital, St. Louis, MO; 2Pacific Sleep Medicine, La Jolla, CA 63017, USA.Laboratory and field studies of naps and caffeine as practical countermeasures for sleep-wake problems associated with night work.

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INSERM U 272 Université de Nancy I, France

Caffeine and the central nervous system: mechanisms of action, biochemical, metabolic and psychostimulant effects.

Brain Res Brain Res Rev. 1992 May-Aug;17(2):139-70.


Department of Gastroenterology, St Bartholomew's Hospital, West Smithfield, London, UK.

L-phenylalanine releases cholecystokinin (CCK) and is associated with reduced food intake in humans: evidence for a physiological role of CCK in control of eating.

Metabolism. 1994 Jun;43(6):735-8.


Center for Occupational and Health Psychology, School of Psychology, Cardiff University, UK.

Effects of caffeine on human behavior.

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INSERM U 666, Faculty of Medicine, UDS, Strasbourg Cedex, France.

Is caffeine a cognitive enhancer?

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Faculdade de Biociências, PUCRS, Porto Alegre, Brazil.

Caffeine, mental health, and psychiatric disorders.

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