国家自然科学基金面上项目81171345;中央补助地方公共卫生专项资金肺癌早诊早治项目和2012年高等学校博士学科点专项科研基金No.20121202110005资助
This study was supported by the grants from the National Natural Science Foundation of China to Ying WANG81171345;Lung Cancer Early Detection and Treatment Project Funded by the Public Health Special Sub-sidy from the Central Government, Research Fund for the Doctoral Program of Higher Education of China both to Tielian YU20121202110005