国家自然科学基金面上项目81372177;甘肃省自然科学基金1107RJZA106、 1308RJZA284;全军医药卫生科研基金CLZ15JA01 Supported by the National Natural Sciences Foundation of China81372177;the Natural Science Foundation of Gansu Province1107RJZA106,1308RJZA284;the Medical Scientific Research Projects of PLACLZ15JA01