Funding for this research was provided by:
China Scholarship Council (201608530178)
Health Commission of Yunnan province (H-201616)
Received: 14 August 2019
Accepted: 17 October 2019
First Online: 2 December 2019
Ethics approval and consent to participate
: This study was approved by the Ethical Institutional Review Board of Kunming Medical University (ref: 2018-LunShen-no. 10), and written informed consent of patients and/or their relatives was obtained before inclusion.
: The consent to the publication of lung and diaphragmatic images was obtained from the subjects.
: The authors declare that they have no competing interests.