Concurrent use of stable doses of oral corticosteroids (≤ 10 mg/ day) and/ or NSAIDs was permitted, and folate supplementation was given. b: all infliximab doses given in combination with methotrexate and folate with some on corticosteroids and/ or NSAIDs c: p < 0.001, for each infliximab treatment group vs. control d: greater values indicate more joint damage. e: