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APA Citation
Okumura, Y., Nishimura, R., Nakatsukasa, K., Yoshida, A., Masuda, N., Tanabe, M., Shien, T., Tanaka, S., Arima, N., Komoike, Y., Taguchi, T., Iwase, T., Inaji, H., Ishitobi, M., & Society, C. S. G. o. S. R. o. t. J. B. C. (n.d.). change in estrogen receptor, HER2, and Ki-67 status between primary breast cancer and ipsilateral breast cancer tumor recurrence. European journal of surgical oncology, 41(4), 548–552. http://access.bl.uk/ark:/81055/vdc_100026005212.0x000035