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- [1] Head-to-head, randomised, crossover study of oral versus subcutaneous methotrexate in patients with rheumatoid arthritis: drug-exposure limitations of oral methotrexate at doses ≥15 mg may be overcome with subcutaneous administration [J]. ANNALS OF THE RHEUMATIC DISEASES, 2014, 73 (08) : 1549 - 1551