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Chiarelli, A.M., Low, K.A., Maclin, E.L., Fletcher, M.A., Fabiani, M., & Gratton, G. (2019). The Optical Effective Attenuation Coefficient as An Informative Measure of Brain Health in Aging. Photonics, 6(3), 79; https://doi.org/10.3390/photonics6030079 (special issue on Neurophotonics: Optics for the brain; https://www.mdpi.com/journal/photonics/special_issues/neurophotonics).