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Elderly patients with comorbidities in the definition of difficult-to-treat rheumatoid arthritis

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Footnotes

  • Handling editor Josef S Smolen

  • Contributors ST, YK and TT designed the study and wrote the manuscript.

  • Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.

  • Competing interests YK has received grants or speaking fees from AbbVie, Astellas, Ayumi, Bristol-Myers Squibb, Chugai, Eisai, Eli Lilly, Hisamitsu, Jansen, Kissei, Pfizer, Sanofi, Takeda, Tanabe-Mitsubishi and UCB. TT has received research grants or speaking fees from Astellas Pharma, Bristol–Myers KK, Chugai Pharmaceutical Co, Daiichi Sankyo Co, Takeda Pharmaceutical Co, Teijin Pharma, AbbVie GK, Asahikasei Pharma Corp, Mitsubishi Tanabe Pharma, Astra Zeneca KK, Eli Lilly Japan KK, Novartis Pharma KK, Abbivie GK, Nipponkayaku Co, Janssen, Pharmaceutical KK, Taiho Pharmaceutical Co and Pfizer Japan.

  • Patient and public involvement Patients and/or the public were not involved in the design, or conduct, or reporting, or dissemination plans of this research.

  • Provenance and peer review Not commissioned; externally peer reviewed.