Funding for this research was provided by:
Ministry of Science and Technology, Taiwan (105-2314-B-182-050-MY3)
Chang Gung Memorial Hospital (CMRPG8F1911, 1921, 1931, and 1941 and 8E0212)
Received: 17 March 2019
Accepted: 3 July 2019
First Online: 19 July 2019
Ethics approval and consent to participate
: The study was approved by the Institutional Review Board of Chang Gung Memorial Hospital (IRB No.104-8261C), and we obtained written informed consent from all participants’ parents or legal guardians.
: Not applicable.
: The authors declare that they have no competing interests.