Miura, Kazuto
Morita, Osamu
Hirano, Toru
Watanabe, Kei
Fujisawa, Jun’ichi
Kondo, Naoki
Netsu, Takahiro
Hanyu, Tadamasa
Shobugawa, Yugo
Endo, Naoto
Article History
Received: 1 July 2018
Revised: 18 February 2019
Accepted: 26 February 2019
First Online: 8 March 2019
Compliance of ethical standards
:
: None of the authors have any potential conflict of interest.
: We declare that all patients gave informed consent prior to inclusion in this study.
: This cross-sectional study was approved by an institutional research ethics board; we enrolled RA patients from the outpatient clinics of Nagaoka Red Cross Hospital and Niigata University Hospital. All patients provided written informed consent before the enrollment.