314248.fig.001a
(a) Normal scan
314248.fig.001b
(b) Subgroup 1
314248.fig.001c
(c) Subgroup 2
314248.fig.001d
(d) Subgroup 3
Figure 1: Examples of (a) “normal,” (b) “subgroup 1,” (c) “subgroup 2,” and (d) “subgroup 3” images.