1. Aserinsky, E. & Kleitman, N. Regularly occurring periods of eye motility, and concomitant phenomena, during sleep. Science 118, 273–274 (1953).
2. Vogel, G. Studies in psychophysiology of dreams. III. The dream of narcolepsy. Arch. Gen. Psychiatry 3, 421–428 (1960).
3. American Academy of Sleep Medicine. International Classification of Sleep Disorders 3rd edn. (American Academy of Sleep Medicine, Darien, IL, 2014).
4. Honda, Y. Census of narcolepsy, cataplexy and sleep life among teenagers in Fujisawa city. Sleep. Res. 8, 191 (1979).
5. Tashiro, T., Kanbayashi, T., Iijima, S. & Hishikawa, Y. An epidemiological study on prevalence of narcolepsy in Japanese. J. Sleep. Res. 1(suppl), 228 (1992).