Funding for this research was provided by:
Kementerian Riset Teknologi Dan Pendidikan Tinggi Republik Indonesia (No. 2601/UN2.R3.1/HKP05.00/2017)
Universitas Indonesia (No. NKB-0194/UN2.R3.1/HKP.05.00/2019)
Received: 14 April 2019
Accepted: 19 June 2019
First Online: 28 June 2019
Ethics approval and consent to participate
: All authors hereby declare that all experiments have been examined and approved by the Ethics Committee of the Faculty of Medicine, Universitas Indonesia (No. 995/UN2.F1/ETIK/2016, protocol number 16–11-432) and have therefore been performed in accordance with the ethical standards laid down in the 1964 Declaration of Helsinki. A written informed consent was obtained from the parents before inclusion into the study.
: Not applicable.
: The authors declare that they have no competing interests.