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 J.E.E. and N.D.B. acknowledge NIH funding support from grant number 5RC1GM091755. N.D.B. acknowledges DOE funding support from grant number DE-FG02-03ER46057. I.A. acknowledges support from the Presidential Early Career Award for Scientists and Engineers. C.P. acknowledges support from the FSU COFRS Award 032968, the Ralph E. Powe Junior Faculty Enhancement Award, and NSF-CMMI-1334012. A portion of this work is part of the Chemical Imaging Initiative at Pacific Northwest National Laboratory under Contract DE-AC05-76RL01830 operated for DOE by Battelle.