Shintaro Nagashima, Ko Ko, Chikako Yamamoto, E. Bunthen, Serge Ouoba, Channarena Chuon, Masayuki Ohisa, Aya Sugiyama, Tomoyuki Akita, Md. Shafiqul Hossain, et al. Prevalence of total hepatitis A antibody among 5 to 7 years old children and their mothers in Cambodia. Scientific Reports. 2021. 11. 1
Toshifumi Tada, Hidenori Toyoda, Takashi Kumada, Akemi Kurisu, Aya Sugiyama, Tomoyuki Akita, Masayuki Ohisa, Hiroshi Aikata, Daiki Miki, Kazuaki Chayama, et al. Comparison of liver disease state progression in patients with eradication of versus persistent infection with hepatitis C virus: Markov chain analysis. Journal of viral hepatitis. 2021. 28. 3. 538-547
Ko Ko, Shintaro Nagashima, Bunthen E, Serge Ouoba, Tomoyuki Akita, Aya Sugiyama, Masayuki Ohisa, Takemasa Sakaguchi, Hidetoshi Tahara, Hiroki Ohge, et al. Molecular characterization and the mutation pattern of SARS-CoV-2 during first and second wave outbreaks in Hiroshima, Japan. PloS one. 2021. 16. 2. e0246383
Toshifumi Tada, Hidenori Toyoda, Satoshi Yasuda, Takashi Kumada, Akemi Kurisu, Masayuki Ohisa, Tomoyuki Akita, Junko Tanaka. Long-term prognosis of liver disease in patients with eradicated chronic hepatitis C virus: An analysis using a Markov chain model. Hepatology Research. 2020. 50. 8. 936-946
Ko, Ko, Takahashi, Kazuaki, Nagashima, Shintaro, Yamamoto, Chikako, Ork, Vichit, Sugiyama, Aya, Akita, Tomoyuki, Ohisa, Masayuki, Chuon, Channarena, Hossain, Md. Shafiqul, et al. Existence of hepatitis B virus surface protein mutations and other variants: demand for hepatitis B infection control in Cambodia. BMC INFECTIOUS DISEASES. 2020. 20. 1