Funding for this research was provided by:
Natural Science Foundation of Shanghai (15ZR1400500)
Text and Data Mining valid from 2019-01-29
Received: 17 September 2018
Revised: 8 November 2018
Accepted: 10 December 2018
First Online: 29 January 2019
Compliance with ethical standards
: The authors declare that they have no conflict of interest.
: The study conformed to the principles outlined in the Declaration of Helsinki and was approved by the Scientific Advisory Board and Ethical Review Committee at Donghua University (IRB No. 2013-20).