Hanaoka, Hironari http://orcid.org/0000-0002-5172-1102
Iida, Harunobu
Kiyokawa, Tomofumi
Takakuwa, Yukiko
Kawahata, Kimito
Article History
Received: 3 July 2018
Revised: 31 August 2018
Accepted: 9 September 2018
First Online: 14 September 2018
Compliance with ethical standards
: This study was approved by the Ethics Committee of St. Marianna University School of Medicine (approval number 3502). Since this study was conducted under a retrospective cohort design without any samples taken besides those for clinical use, written informed consent was not required, in accordance with the guidelines of the Ministry of Health, Labour, and Welfare of Japan.
: None.