Matsuki C, To M, Kondo Y, Sugiyama H, Yamamoto Y, Shimizu T, Kamata Y, Saruta J, Tsukinoki K. Associations between brain-derived neurotrophic factor and estradiol in women's saliva.  Neuro Endocrinol Lett. 2014 Jan;  35(3): 236-241

Izawa S, Sugaya N, Yamamoto R, Ogawa N, Nomura S. The cortisol awakening response and autonomic nervous system activity during nocturnal and early morning periods.  Neuro Endocrinol Lett. 2010 Jan;  31(5): 685-689

Umegaki H, Yamamoto A, Suzuki Y, Iguchi A. Stimulation of the hippocampal glutamate receptor systems induces stress-like responses.  Neuro Endocrinol Lett. 2006 Jun;  27(3): 339-343

Yasuda N, Yamamoto K, Iwashita N. Concurrent evaluation of salivary and urinary α-amylase activity following prolonged exercise with or without carbohydrate solution in aerobically active men.  Neuro Endocrinol Lett. 2021 Aug;  42(4): 265-276

Usuda T, Yamaguchi T, Hu A, Kawakami Z, Karasawa S, Yamamoto M, Kobayashi H. Within-Session Reductions in Negative Mood During a 4-Week Upright Sitting Practice in Japanese Young Adults: An Exploratory Observational Study.  Neuro Endocrinol Lett. 2026 Apr;  47(2): 94-102