Ryu, Jiwook
Hamano, Eika
Nishimura, Masaki
Satow, Tetsu
Takahashi, Jun C.
Article History
Received: 10 February 2020
Accepted: 14 April 2020
First Online: 30 April 2020
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee (name of institute/committee) and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. For this type of study, formal consent is not required. This observational cohort study was approved by the Ethics Committee of the National Cerebral and Cardiovascular Center (IRB approval no. M30-013).