DDish   Treatment    Distance
    1         GNA         3.2
    2         GNA         4.2
    3         GNA         4.3
    4         GNA         5.6
    5        CONA         3.0
    6        CONA         4.2
    7        CONA         3.5
    8        CONA         4.8
    9         PBS         5.6
   10         PBS         6.5
   11         PBS         6.0
   12         PBS         7.0