The trial enrolled 400 Group Health Cooperative patients who had had low back pain for at least three months.

该试验纳入团体保健联谊社的400个患者，他们至少有持续三个月腰痛。

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But to have such satisfied members, experts say, a health insurance cooperative needs a large group of people.

但是专家表示，为了有更多这样满足的成员，健康保险合作社还需要一大群人参与。

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Study results show that an effective awareness-exercise intervention can improve the PE underachievers 'mental health. The effect of group cooperative activities is the best.

研究结果显示：有效的认知—运动干预可以改善体育后进生的心理健康状况，其中小组合作活动组效果最佳。

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"I don't think it is coincidental that the most competitive market for health insurance in the state is where Group Health Cooperative exists, " Oemichen said.

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Other trial sites along with the University of Maryland Medical Center are Baylor College of Medicine, Cincinnati Children's Hospital Medical Center, Emory University, Saint Louis University, Seattle Group Health Cooperative, the University of Iowa, and Vanderbilt University.

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Some of the biggest employers in the area include MDU Resources Group, Basin Electric Power Cooperative, Cloverdale Foods, Sanford Health, St.

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