Funding for this research was provided by:
F. Hoffmann-La Roche
Received: 7 February 2018
Accepted: 21 February 2019
First Online: 7 March 2019
Ethics approval and consent to participate
: We obtained written informed consent from participants who agreed to participate in this study. For participants under 18 years old, written informed consent was obtained from their accompanying parent or guardian. This research received ethics approval from Faculty of Public Health University of Indonesia number 42/ExternalRef removed/FKMUI/2010 and Faculty of Medicine Udayana University number 441/Skrt/VI/2010, in accordance with ethical standards in using humans as study subjects, as attached in the supplementary materials on this submission.
: Not applicable.
: The authors declare that they have no competing interests.
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