Funding for this research was provided by:
National Natural Science Foundation of China (81771230, 81322017, 81701133, U1505222)
Joint Funds for the Innovation of Science and Technology, Fujian Province (2017Y9087)
Text and Data Mining valid from 2019-05-10
Received: 5 September 2018
Accepted: 16 April 2019
First Online: 10 May 2019
Change Date: 11 January 2020
Change Type: Correction
Change Details: The original version of this article unfortunately contained mistakes in the affiliation section.
Compliance with Ethical Standards
: The authors declare that they have no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. This article does not contain any studies with animals performed by any of the authors.
: Informed consent was obtained from the parents of the children.