Evaluation of the effectiveness of aromatherapy using combination of questionnaire and near-infrared spectroscopy oleh Minae Isawa, Akemi Shinno, Hiroshi Itoh, Noriko Kose, Haruyuki Ishino, Tomohiro Nishimura, Masatoshi Tomi, Takeo Tsujii, Hideyo Shimada, Hidetsugu Saito, Emi Nakashima