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基金项目：This work was supported by the National Natural Science Foundation
of China (No.39870829).
作者单位：开丽（第三军医大学大坪医院野战外科研究所, 重庆 400042）
胡德耀（第三军医大学大坪医院野战外科研究所, 重庆 400042）
王中峰（中国科学院上海生命科学研究院, 上海生理研究所, 上海 200031）
施玉?（中国科学院上海生命科学研究院, 上海生理研究所, 上海 200031）
刘良明（第三军医大学大坪医院野战外科研究所, 重庆 400042）
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收稿日期：2000年10月26日
修稿日期：2000年12月5日
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