Reply: reducing background fluorescence reveals adhesions in 3D matrices

1Departments of Chemical and Biomolecular Engineering, The Johns Hopkins University, Baltimore, MD 21218, USA. 2Johns Hopkins Physical Sciences in Oncology Centre, Johns Hopkins University, Baltimore, MD 21218, USA. 3Departments of Medicine and Cell Biology and Physiology, Washington University School of Medicine, St. Louis, MO 63110, USA. 4BRIGHT Institute, Washington University School of Medicine, St. Louis, MO 63110, USA. 5Correspondence should be addressed to D.W. or G.D.L. (wirtz@jhu.edu or glongmor@dom.wustl.edu) Reply: reducing background fluorescence reveals adhesions in 3D matrices