Koyama, S., Tabuchi, T., Okawa, S., Kadobayashi, T., Shirai, H., Nakatani, T., & Miyashiro, I. (2021). Changes in Smoking Behavior Since the Declaration of the COVID-19 State of Emergency in Japan: A Cross-sectional Study From the Osaka Health App. J Epidemiol.

Koyama, Shihoko, Takahiro Tabuchi, Sumiyo Okawa, Takayoshi Kadobayashi, Hisaya Shirai, Takeshi Nakatani, et Isao Miyashiro. "Changes in Smoking Behavior Since the Declaration of the COVID-19 State of Emergency in Japan: A Cross-sectional Study From the Osaka Health App." J Epidemiol 2021.

Koyama, Shihoko, et al. "Changes in Smoking Behavior Since the Declaration of the COVID-19 State of Emergency in Japan: A Cross-sectional Study From the Osaka Health App." J Epidemiol 2021.