1. Centre for Industrial and Engineering Optics, School of Physics, Clinical and Optometric Sciences, Technological University Dublin, Grangegorman Campus, Central Quad, Grangegorman Lower, D07 ADY7 Dublin, Ireland
2. School of Art and Design, Technological University Dublin, Grangegorman Campus, Grangegorman Lower, D07 ADY7 Dublin, Ireland
3. Department of Radiology, Mayo Clinic, Rochester, Minnesota 55905, United States