Table 4 Modifications in the threshold values proposed in [5] (C 1 = Count 1, C 2 = Count 2, C 3 =Count 3).

1

C 1 < 250, C 2 > 950 and C 1 × C 2/C 3 < 210

C 1 < 200, C 2 > 760 and C 1 × C 2/C 3 < 168

2

250 ≤ C 1 < 400, C 2 < 600 and C 1 × C 2/C 3 < 210

200 ≤ C 1 < 320, C 2 < 480 and C 1 × C 2/C 3 < 168

3

C 1 ≥ 250 &C 2 > 950

C 1 ≥ 200 &C 2 > 760

4

C 2 ≥ 1100

C 2 ≥ 880