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Authors
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Funding
Funding for this research was provided by:
education department of Sichuan Province (16ZA0281)
Collaborative innovation center of elderly care and health (YLZBZ1818)
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Article History
Received: 4 May 2019
Revised: 28 June 2019
Accepted: 23 July 2019
First Online: 12 August 2019
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: This article does not contain any studies with human participants performed by any of the authors.
