Funding for this research was provided by:
Japan Agency for Medical Research and Development (18fk0410008h0003)
Article History
Received: 28 February 2019
Revised: 14 May 2019
Accepted: 15 May 2019
First Online: 20 May 2019
Compliance with ethical standards
:
: The authors have no competing interests.
: This retrospective study was approved by the committee of academic and statistical investigation of the Japanese Society of Hematology and institutional review board of Tokyo Women’s Medical University (no. 4585; December 19, 2017) and was performed in accordance with the Ethical Guidelines for Medical and Health Research involving Human Subjects and the ethical standards in the Helsinki Declaration of 1975, as revised in 2008.