基金项目：This work was supported by the National Natural Science Foundation of China (No.29925515) and the Natural Science Foundation of Hubei Province (No.99J137).
作者单位：张先荣（武汉大学医学院生理学教研室,武汉 430071）
韩丹（武汉大学医学院生理学教研室,武汉 430071）
唐岳枫（中国科学院武汉物理与数学研究所波谱与原子分子物理国家重点实验室,武汉 430071）
刘买利（中国科学院武汉物理与数学研究所波谱与原子分子物理国家重点实验室,武汉 430071）
尹世金（武汉大学医学院生理学教研室,武汉 430071）
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