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HIROKAZU IWASAKI
Dept. of Obstetrics and Gynecology, The Tsukuba Univ.
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SHUNICHI ITO
Dept. of Obstetrics and Gynecology, The Tsukuba Univ.
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SATOSHI USUKI
Dept. of Obstetrics and Gynecology, The Tsukuba Univ.
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KIYOSHI OIKAWA
Dept. of Clinical Pathology, Institute of Clinical Medicine, The Tsukuba Univ.