Text and Data Mining valid from 2018-05-22
Received: 3 October 2017
Accepted: 9 May 2018
First Online: 22 May 2018
Ethics approval and consent to participate
: The study was reviewed and approved by the Faculty of Medicine, Public Health and Nursing, Universitas Gadjah Mada Institutional Review Board.The need of for individual informed consent was waived by Institutional Review Board of Faculty of Medicine, Public Health and Nursing, Universitas Gadjah Mada.
: The authors declare that they have no competing interests.
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