anchor.diff:                td.qi-date= '{{ sess.acquisitionDate | moment }}'
                 each prop in properties[group]
                   // The property value with four decimals.
  -                td.qi-number= '{{ sess.modeling.' + prop + ' | number:4 }}'
  +                td.qi-number= '{{ sess.modeling.' + prop + '.average | number:4 }}'
                   // The percent change without decimals.
  -                td.qi-pct= '{{ sess.modeling.' + prop + '_pct_change | number:0 }}'
  +                td.qi-pct= '{{ sess.modeling.' + prop + 'PctChange | number:0 }}'
  
positive.code:           // column for the property value and one column for the percent
            // change.
            each prop in properties[group]
              colgroup.qi-prop-group
                col
                col
            
  
negative.code: //- The group headings.
  - headings = { 'ktrans': 'Vascular Permeability Transfer Constant (K<sup>trans</sup>)', 've': 'Extravascular Extracellular Volume Fraction (v<sub>e</sub>)', 'taui': 'Intracellular H<sub>2</sub>O Mean Lifetime (&tau;<sub>i</sub>)' }
  //- The group properties.
  - properties = { 'ktrans': ['deltaKTrans', 'fxlKTrans', 'fxrKTrans'], 've': ['vE'], 'taui': ['tauI'] }
  //- The group column headings.
  - columns = { 'deltaKTrans': '&Delta;K<sup>trans</sup>', 'fxlKTrans': 'FXL K<sup>trans</sup>', 'fxrKTrans': 'FXR K<sup>trans</sup>', 'v_e': 'V<sub>e</sub>', 'tau_i': 'T<sub>i</sub>'}
  
  