1 Modern Human Anatomy Program, University of Colorado Anschutz Medical Campus, Aurora, Pennsylvania, USA.
2 Department of Neurology, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA.
3 Department of Neurology, Department of Biostatistics and Informatics, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA.
4 Modern Human Anatomy Program, Department of Cell and Developmental Biology, Department of Neurology, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA.