Another promising treatment: an anti-CD20 antibody--kind of a second-generation Rituxan--that Genentech plans to test against rheumatoid arthritis, lupus and multiple sclerosis.

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Roche is developing a test to predict which rheumatoid arthritis patients will respond to standard medications and which have more severe forms that require expensive new drugs.

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In 2003 Novartis had been collaborating with Regeneron Pharmaceuticals to test Regeneron's interleukin-1 blocker in rheumatoid arthritis.

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In 2003 Novartis had been collaborating with Regeneron Pharmaceuticals (nasdaq: REGN - news - people ) to test Regeneron's interleukin-1 blocker in rheumatoid arthritis.

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