Text and Data Mining valid from 2018-12-01
Received: 3 October 2018
Accepted: 11 December 2018
First Online: 29 December 2018
Ethics approval and consent to participate
: The study was approved by the Institute Ethical Committee of Bharathiar University, India, and also informed consent was obtained from all individual participants included in the study.
: Not applicable.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.