Received: 29 May 2019
Accepted: 21 August 2019
First Online: 11 September 2019
Ethics approval and consent to participate
: Patients were prospectively registered and analyzed in this study. Biopsy sampling and flow cytometric analyses were performed as part of the standard clinical practice. Thus, written informed consent was waived for enrollment. This study was approved by the ethics committee of Okayama University Hospital and adhered to the principles of the Declaration of Helsinki. The study protocol was registered in the UMIN Clinical Trials Registry (UMIN000027730).
: Not applicable.
: The authors declare that they have no competing interests.