Article History
Received: 10 September 2020
Accepted: 26 October 2020
First Online: 2 November 2020
Compliance with ethical standards
:
: All the authors declare that they have no conflicts of interest.
: Our research was an observational study on patients who received chemotherapy due to plasma cell myeloma. This study was approved by the Kangwon National University Hospital institutional review board (KNUH-2019-11-004). Our research was conducted in accordance with the 1964 Helsinki Declaration or comparable standards.
: Informed consent was waived because this study included only retrospective observational data