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from Wikipedia, the free encyclopedia

Rheumatoid arthritis

Rheumatoid arthritis (RA) is a chronic, inflammatory autoimmune disorder that causes the immune system to attack the joints.

It is a disabling and painful inflammatory condition, which can lead to substantial loss of mobility due to pain and joint destruction

Note:   The above text is excerpted from the Wikipedia article "Rheumatoid arthritis", which has been released under the GNU Free Documentation License.
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May 22, 2015

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updated 12:56 pm ET