One but not the other. What that linked article was about: http://academic.evergreen.edu/curricular/imagingthebody/Handouts/alexander_2002.pdf http://academic

One but not the other. What that linked article was about: http://academic.evergreen.edu/curricular/imagingthebody/Handouts/alexander_2002.pdf http://academic.evergreen.edu/curricular/imagingthebody/Hand... What this post also discusses: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2583786/ http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2583786/