Rheumatoid arthritis is an unknown etiology autoimmune diseases, multiple middle-aged women, the cause of the disease complicated machine, no cure for the problems.

类风湿关节炎是一种病因不明的自身免疫性疾病，多发于中年女性，由于病因病机复杂，尚无根治之法。

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Childhood arthritis is the leading cause of acquired disability in children and the sixth-most common chronic childhood disease.

儿童关节炎是引起儿童后天性残疾的首要原因，并在儿童慢性病排行榜上名列第六。

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The search is difficult because doctors, scientists and patients aren't used to thinking of rheumatoid arthritis, asthma and Alzheimer's disease as having the same root cause.

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