Chizuru Tsuruoka,¹ Mutsumi Kaminishi,¹ Mayumi Shinagawa,¹ Yi Shang,¹ Yoshiko Amasaki,¹ Yoshiya Shimada,² Shizuko Kakinuma<sup>1,*

1</sup>Department of Radiation Effects Research, National Institute of Radiological Sciences, National Institutes for Quantum and Radiological Science and Technology, Chiba, Japan
²Institute for Environmental Science, Kamikita-gun, Aomori, Japan

^* Address for correspondence: 4-9-1 Anagawa, Inage-ku, Chiba 263-8555, Japan; email: kakinuma.shizuko@qst.go.jp.