Funding for this research was provided by:
National Science Foundation (BNS-8609013)
Article History
Received: 29 July 2018
Revised: 30 March 2019
Accepted: 8 April 2019
First Online: 28 May 2019
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.
: Permission from guardians was obtained to photograph the children in Fig.InternalRef removedand to use the photograph for research-related purposes.