Randomised Double-blind Placebo-Controlled Multicentre Trial for the Effects of Yokukansan in Smokers with Depressive Tendencies

Maki Komiyama, Yuka Ozaki, Hiromichi Wada, Hajime Yamakage, Noriko Satoh-Asahara, Akihiro Yasoda, Yoichi Sunagawa, Tatsuya Morimoto, Yuko Takahashi and Koji Hasegawa