Funding for this research was provided by:
Dean-MORU, Faculty of Tropical Medicine, Mahidol University
Text and Data Mining valid from 2018-05-11
Received: 18 May 2017
Accepted: 8 May 2018
First Online: 11 May 2018
Ethics approval and consent to participate
: This study was approved by the Ethics Committee of the Faculty of Tropical Medicine, Mahidol University (MUTM 2016–015-01) and the local ethics committee in Malang, Indonesia (196/EC/KEPK/S2/05/2016). Respondents were recruited after giving written informed consent.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.