the chart is as fuzzy as the PII results themselves.
you unlock this door with the key of imagination... beyond it is another dimension... a dimension of sound, a dimension of sight, and dimension of mind... you just crossed over into The Phase II Twilight Zone.
The chart is from Peregrine's 2013 ASCO poster and yes, for some reason the quality of that poster is bad. I think that someone here had a better copy of that chart. Maybe it was CJ.