Kazuhiro Sakai

The effect of sleep restriction and psychological load on the diurnal metabolic changes in tryptamine-related compounds in human urine

Hideyo Takahashi, S. Matsumoto, H. Inagaki, 2012, Environmental Health and Preventive Medicine.

Novel tryptamine-related substances, 5-sulphatoxydiacetyltryptamine, 5-hydroxydiacetyltryptamine, and reduced melatonin in human urine and the determination of those compounds, 6-sulphatoxymelatonin, and melatonin with fluorometric HPLC.

Hideyo Takahashi, S. Matsumoto, H. Inagaki, 2009, Journal of chromatography. B, Analytical technologies in the biomedical and life sciences.

Shorter sleep duration is associated with potential risks for overwork-related death among Japanese truck drivers: use of the Karoshi prodromes from worker’s compensation cases

Masaya Takahashi, T. Kubo, S. Koda, 2021, International Archives of Occupational and Environmental Health.