Funding for this research was provided by:
National Key Scientific and Technical Program (2013ZX10003009)
Received: 7 May 2018
Accepted: 27 September 2018
First Online: 11 October 2018
Ethics approval and consent to participate
: This prospective study was approved by The Ethics Committee of the Shanghai Pulmonary Hospital. Each participant gave written informed consent before enrollment.
: Not applicable.
: The authors declare that they have no competing interests.
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