Guan, Wei-jie
Yuan, Jing-jing
Gao, Yong-hua
Li, Hui-min
Zheng, Jin-ping
Chen, Rong-chang
Zhong, Nan-shan
Article History
Received: 18 February 2016
Accepted: 2 June 2016
First Online: 24 June 2016
Competing interests
: Profs. Zhong and Chen declared that they had received Changjiang Scholars and Innovative Research Team in University ITR0961, The National Key Technology R&D Program of the 12th National Five-year Development Plan 2012BAI05B01 and National Key Scientific & Technology Support Program: Collaborative innovation of Clinical Research for chronic obstructive pulmonary disease and lung cancer No. 2013BAI09B09. Dr. Guan declared that he has received National Natural Science Foundation No. 81400010 and 2014 Scientific Research Projects for Medical Doctors and Researchers from Overseas, Guangzhou Medical University No. 2014C21. All other authors declared no potential conflict of interest. None of the funding sources had any role on the study.