Funding for this research was provided by:
National Institute on Deafness and Other Communication Disorders (R01 DC015004)
Philippine Council for Health Research and Development - Department of Science and Technology (Balik-Scientist)
Text and Data Mining valid from 2018-06-15
Received: 5 January 2018
Accepted: 8 May 2018
First Online: 15 June 2018
Compliance with ethical standards
: The authors declare that they have no conflict of interest.
: The study was conducted according to the principles of the Declaration of Helsinki. Prior to initiation, it was approved by the University of the Philippines Manila Research Ethics Board, the National Commission on Indigenous Peoples (NCIP), and the Colorado Multiple Institutional Review Board.
: Community consent was obtained as part of the NCIP approval process prior to the start of the study. In addition, informed consent was obtained from individual participants included in the study.