- Received September 11, 2012.
- Accepted for publication September 13, 2012.
- Reprints: Elmus G. Beale, PhD, Paul L. Foster School of Medicine, 5001 El Paso Dr, El Paso, TX 79905. E-mail: .
- Supported in part by a grant from the National Center for Research Resources (R13 RR023236).
- First published December 14, 2015.
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