Text and Data Mining valid from 2019-01-08
Received: 17 September 2018
Accepted: 28 December 2018
First Online: 8 January 2019
Ethics approval and consent to participate
: The ethical clearance for primary data was obtained from the authorities of the Ethics Commitee of the National Institute of Health Reserach and Development, Ministry of Health of Indonesia (number LB.02.01/5.2/KE.020/2017).
: Not applicable.
: The authors declare that they have no competing interests.
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