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E-mail: andrew.m.sherrill@emory.edu
The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.
There was no additional external funding received for this study.
This research was supported by the Center for the Interdisciplinary Study of Language and Literacy at Northern Illinois University (http://www.niu.edu/cisll/).
© 2015 Sherrill et al