About the Authors
- Adi L Tarca
- Vincent J Carey
- Xue-wen Chen
- Roberto Romero
- Sorin Drăghici
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*To whom correspondence should be addressed. E-mail: sorin@wayne.edu
Competing Interests
The authors have declared that no competing interests exist.
Author Contributions
ALT, VJC, XwC, RR, and SD wrote various sections of the paper. VJC and ALT wrote the sample R code.