Funding for this research was provided by:
Medical Science and Technology Foundation of Guangdong Province (A2010553)
the planned science and technology project of Shenzhen municipality (201102078)
the non-profit scientific research project of Futian district (FTWS201120)
Received: 6 December 2018
Accepted: 27 January 2019
First Online: 31 January 2019
Change Date: 10 July 2019
Change Type: Correction
Change Details: .
: Q.G are members of editorial boards of nine international respiratory journals and reviewers of nine international respiratory journals (six are included in SCI).
: The studies were approved by our Institutional Review Boards. Ethical approval from the regulation committee (Ethical Committee of Shenzhen) was granted for the study protocol. Informed consent (except that from the patients with confusion) was obtained in writing from the patient prior to enrollment. They were informed the content of the study on admission and then signed the documents if they agreed.
: Not applicable.
: The authors declare that they have no competing interests.
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