Received: 7 April 2020
Accepted: 18 February 2021
First Online: 4 March 2021
: This study was approved by the Institutional Review Board of the Faculty of Medicine, Universitas Gadjah Mada/Dr. Sardjito Hospital, Yogyakarta, Indonesia (KE/FK/0811/EC/2018). Written informed consent was obtained from all parents for participating in this study.
: Not applicable.
: The authors declare that they have no competing interests.