Funding for this research was provided by:
Science and education of public health project for young medical talents of Jiangsu Province (QNRC2016747)
the Gusu youth medical talent (3101030342000318)
Science and technology bureau research project of Yichang City of Hubei Province (A16-301-24)
the Clinical Medical Center of Suzhou (szzx201502)
the Societal and Developmental Project of Suzhou (SS201630)
the Suzhou Key Laboratory for Respiratory Medicine (SZS201617)
Received: 20 August 2019
Accepted: 4 December 2019
First Online: 21 December 2019
Consent for publication
: Not applicable.
: The authors declare that they have no competing interests.