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Authors
Ogawa, Tetsushi https://orcid.org/0000-0002-1994-8286
Takizawa, Fumihiko
Mukoyama, Yuri
Ogawa, Atsushi
Ito, Junko
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Article History
Received: 14 December 2020
Accepted: 30 January 2021
First Online: 22 February 2021
Compliance with ethical standards
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: The authors have declared that no conflict of interest exists.
: All procedures performed in this study involving human participants were in accordance with the ethical standards of the Institutional Ethics Committee of Toranomon Hospital (Approval No. 2088) and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: Informed consent was not required because of the nonintervention and retrospective study design. For chromosome analysis, written informed consent was obtained from all individual participants or their parents.
