The intensity of immunohistochemistry staining with pAkt in breast tissue. (a) 3+ positive (intensity was very strong). (b) 2+ positive (clear stain but the intensity was not as strong as 3+). (c) 1+ positive (some light stain). (d) Negative (no stain). (a-d) Low-power images. (e-h) High-power images corresponding to (a-d), respectively.