Funding for this research was provided by:
National Key Project for Infectious Disease (2013ZX10003009)
Received: 13 November 2017
Accepted: 14 August 2018
First Online: 4 September 2018
Ethics approval and consent to participate
: The Ethics Committee of Shanghai Pulmonary Hospital and the Ethics Committee of Tongji University reviewed and approved this prospective study and written informed consent was obtained from each participant before enrollment.
: Not applicable.
: The authors declare that they have no competing interests.
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