Funding for this research was provided by:
Text and Data Mining valid from 2018-05-02
Received: 24 October 2017
Accepted: 25 April 2018
First Online: 2 May 2018
Ethics approval and consent to participate
: The study was approved by the Medical Research Ethics Committee, Faculty of Medicine Universitas Indonesia and informed consents from all participants were obtained.
: The authors declare that they have no competing interests.
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