Nagata, Hiroshi http://orcid.org/0000-0003-0902-9208
Ishihara, Soichiro
Abe, Hiroyuki
Ushiku, Tetsuo
Kishikawa, Junko
Tanaka, Toshiaki
Hata, Keisuke
Kawai, Kazushige
Fukayama, Masashi
Nozawa, Hiroaki
Funding for this research was provided by:
MEXT | Japan Society for the Promotion of Science (16K07143, 17K10620, 17K10621)
Article History
Received: 9 March 2018
Revised: 16 February 2019
Accepted: 13 March 2019
First Online: 19 April 2019
Competing interests
: The authors declare no competing interests.
: The study protocol was approved by the research ethics committee at the Graduate School of Medicine, the University of Tokyo (3252-(7)). The need for written consent was waved by the Board because of the retrospective nature of the study. The research was conducted in accordance with the 1964 Declaration of Helsinki and its later amendments.
: The datasets generated and analysed during the current study are available from the corresponding author on reasonable request.
: This work is published under the standard license to publish agreement. After 12 months the work will become freely available and the license terms will switch to a Creative Commons Attribution 4.0 International (CC BY 4.0).