Figure 2.

Rank abundance curve demonstrating the frequency of cases (y-axis) belonging to one of 612 distinct fine types, which are stored in the EpiScanGIS database. The most frequent fine type is B:P1.7-2,4:F1-5 (n = 328 in April 2008); 391 of 612 fine types occurred only once (December 2001 through April 2008).