Seasonal variation of mood and behaviour in a healthy middle‐aged population in Japan 論文 Masako Okawa・S. Shirakawa・Makoto Uchiyama・M Oguri・Masako Kohsaka・Kazuo Mishima・K Sakamoto・Hiromasa Inoue・Kazumasa Kamei・Keiichi Takahashi ·1996-10-01 ·『Acta Psychiatrica Scandinavica』 94(4) pp. 211-216 doi:10.1111/j.1600-0447.1996.tb09851.x