Kamiya, Sakura
Nakamori, Yuna
Takasawa, Akira
Takasawa, Kumi
Kyuno, Daisuke
Ono, Yusuke
Magara, Kazufumi
Osanai, Makoto http://orcid.org/0000-0003-1754-252X
Article History
Received: 20 December 2022
Accepted: 25 January 2023
First Online: 7 February 2023
Declarations
:
: This study was reviewed and approved by the Institutional Ethics Committee (Approval Number: 4-1-44) and Institutional Review Board (IRB study number: 312‐230) of Sapporo Medical University. Specimens of 136 cases of breast cancer collected by surgical resection during the period from 2011 to 2014 were used in this study. The Ethics Committee waived the need to obtain written informed consent from the patients for the use of human tissues owing to the retrospective nature of the study. The research was conducted in accordance with the Helsinki Declaration. The researchers involved in this study had no access to information that could identify individual participants during or after data collection.
: The authors declare that they have no conflicts of interests.