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Tsubokura M, Nomura S, Yoshida I, Sawano T, Miyazaki M, Tomita S, Oikawa T, Watanabe M. Comparison of external doses between radio-contaminated areas and areas with high natural terrestrial background using the individual dosimeter "D-shuttle" 75 months after the Fukushima Daiichi nuclear power plant accident. J Radiol Prot.2017 Dec 13. doi: 10.1088/1361-6498/aaa147.