Chen, Siqi
Jia, Yajun
Woltering, Steven
Article History
Received: 11 November 2017
Revised: 12 May 2018
Accepted: 20 May 2018
First Online: 2 July 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: The present study was approved by the Institutional Research Ethic Board (IRB) at Texas A&M University (protocol reference: IRB2010-0877D). All participants and one of their guardians provided informed written consent prior to the start of the study