Establishment of negatively-charged indoor air conditions and their biological effects

Takemi Otsuki, Kazuaki Takahashi, Akinori Mase, Takashi Kawado, Muneo Kotani, Yasumitsu Nishimura, Megumi Maeda, Shuko Murakami, Naoko Kumagai, Hiroaki Hayashi, Ying Chen, Yoshie Miura, Takashi Shirahama, Michiharu Yoshimatsu, Kanehisa Morimoto