Funding for this research was provided by:
Deutscher Akademischer Austauschdienst (ICDD Scholarship)
Text and Data Mining valid from 2018-11-19
Received: 29 May 2018
Accepted: 12 November 2018
First Online: 19 November 2018
Compliance with ethical standards
: Requisite authority to conduct the study was obtained from National Commission for Science, Technology and Innovation (NACOSTI); which issued a research clearance permit number 15393.
: Authors state they have no conflicts of interests.