Article History
Received: 18 September 2019
Revised: 18 December 2019
Accepted: 23 January 2020
First Online: 20 February 2020
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest concerning the materials or methods used in this study or the findings specified in this paper. The authors have applied for a patent for the device described in this publication (Authorized by National Intellectual Property Administration, PRC; Patent number: ZL 2017 2 0695409.9).
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration.
: Informed consent was obtained from all individual participants included in the study.