Text and Data Mining valid from 2019-03-14
Received: 20 August 2018
Accepted: 27 February 2019
First Online: 14 March 2019
Ethics approval and consent to participate
: This study was approved by the Ethical Committee of the Huashang College, Guangdong University of Business Studies. Its procedure was in compliance with the Declaration of Helsinki guidelines. All of the participants gave informed consent prior to the study. The author read and approved the final manuscript.
: Not applicable.
: The author declare that they have no competing interests.
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