Serial sections from each biopsy were coded by clinical histopathology laboratory personnel and in each case the middle (slide 2) of the three serial sections was stained with Hematoxylin -Eosin (H&E). Slide 1 of the series was subjected to immunohistochemical staining with EPX-mAb and slide 3 served as an isotype immunoglobulin negative control for the immunohistochemistry.