Lauren E. Salminen, Thomas Conturo, David H. Laidlaw, Ryan Cabeen, Erbil Akbudak, Elizabeth Lane, Jodi Heaps, Jacob Bolzenius, Laurie Baker, Sarah Cooley, Staci Scott, Lee Cagle, Sarah Phillips, and Robert H. Paul. Regional age differences in gray matter diffusivity among healthy older adults. Brain Imaging and Behavior, April 2015.