Visualization 2: Inverse-power-law behavior of cellular motility reveals stromal–epithelial cell interactions in 3D co-culture by OCT fluctuation spectroscopy OldenburgAmy L. YuXiao GillissThomas AlabiOluwafemi TaylorRussell M. A. TroesterMelissa 2015 Visualization 2 Originally published in Optica on 20 October 2015 (optica-2-10-877)