Onozuka, Daisuke http://orcid.org/0000-0001-9596-9188
Hagihara, Akihito
Funding for this research was provided by:
Japan Society for the Promotion of Science (15K08714 and 16H05247)
Article History
Received: 24 March 2016
Revised: 19 October 2016
Accepted: 28 November 2016
First Online: 5 December 2016
Compliance with ethical standards
:
: This work was supported by Japan Society for the Promotion of Science (JSPS) KAKENHI Grant Numbers 15K08714 and 16H05247. The funder had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.
: DO made substantial contributions to conception and design, analyzed data, and wrote the manuscript. AH was involved in drafting the manuscript and critically revising it for important intellectual content.
: The authors have declared that no competing interests exist.
: The study was approved by the ethics committee at Kyushu University Graduate School of Medical Sciences. This was an observational study using national registry data. The requirement for written informed consent was waived. Patient records and other patient information remained anonymous and de-identified prior to analysis. All methods were carried out in accordance with approved guidelines and regulations.