Ra is acomplex disease and there could have been something else about people who drank alcohol that lowered their risk.
风湿性关节炎是一种复杂的疾病,也许饮酒者降低了患病风险与其他的原因有关。
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Ra is acomplex disease and there could have been something else about people who drank alcohol that lowered their risk. The study also had a few other limitations.