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Hitoshi Noguchi
Noguchi Thyroid Clinic and Hospital Foundation, Beppu 874-0932, Japan
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Takayuki Masaki
Oita University School of Medicine, Internal Medicine 1, Yufu 879-5593, Japan
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Tetsuya Kakuma
Oita University School of Medicine, Internal Medicine 1, Yufu 879-5593, Japan
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Masamitsu Nakazato
Miyazaki University School of Medicine, Internal Medicine 3, Miyazaki 889-1692, Japan
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Hironobu Yoshimatsu
Oita University School of Medicine, Internal Medicine 1, Yufu 879-5593, Japan