RETRACTED ARTICLE: Safety and effectiveness of high-dose methotrexate (over 8 mg/week) in 2838 Japanese patients with rheumatoid arthritis: A postmarketing surveillance report.

RETRACTED ARTICLE: Safety and effectiveness of high-dose methotrexate (over 8 mg/week) in 2838 Japanese patients with rheumatoid arthritis: A postmarketing surveillance report.