Funding for this research was provided by:
Ministry of Science and Technology, Taiwan (MOST 107-2314-B-038 -034, MOST 106-2314-B-038-012; MOST 104-2314-B-038-008)
Received: 7 January 2020
Accepted: 13 July 2020
First Online: 17 July 2020
Ethics approval and consent to participate
: The study was approved by the Institutional Review Board of Universitas Gadjah Mada, Indonesia (IRB number: KE/FK/1044/EC/2015). Written informed consent was obtained from each mother before participation.
: Not applicable.
: All authors have declared no potential conflicts of interest regarding the research.