NOTICE: this is the author’s version of a work that was accepted for publication in Journal of Bioscience and Bioengineering.
\nChanges resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document.
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\nA definitive version was subsequently published in Journal of Bioscience and Bioengineering, Volume 117, Issue 5, May 2014. 10.1016/j.jbiosc.2013.10.020