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Prophylaxis for Pneumocystis pneumonia in patients with rheumatoid arthritis treated with biologics, based on risk factors found in a retrospective study

Takayuki Katsuyama, Kazuyoshi Saito, Satoshi Kubo, Masao Nawata and Yoshiya Tanaka*

Arthritis Research & Therapy 2014, 16:R43  doi:10.1186/ar4472