Text and Data Mining valid from 2020-01-16
Received: 4 July 2019
Accepted: 10 January 2020
First Online: 16 January 2020
Ethics approval and consent to participate
: The Commission of Research Ethics of the University of Muhammadiyah Malang (E.5.a/226a/KEPK-UMM/VII/2018) provided ethical approval. Informed consent was sought from each respondent about the details of the study at the beginning of the survey. All respondents signed a written informed consent.
: Not applicable.
: The authors declare that they have no competing interests.