Funding for this research was provided by:
a Grant-in-Aid for Science Research for Behçet’s Disease from the Ministry of Health, Labour and Welfare of Japan (50056096)
Received: 27 February 2018
Accepted: 26 July 2018
First Online: 2 August 2018
Ethics approval and consent to participate
: This study was approved by the ethics committee of the University of Tokyo Hospital and was conducted in compliance with the Declaration of Helsinki. Owing to this study’s retrospective nature, informed written consent could not be obtained from the patients. Nevertheless, all patient data were anonymized. Furthermore, verbal informed consent was obtained from all patients before every examination.
: Not applicable.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.