sentences:  This scale was the first to use a standardized photographic protocol to assess acne severity; since its creation in 1979, the scale has undergone several revisions.The Leeds acne grading technique counts acne lesions on the face, back, and chest and categorizes them as inflammatory or non-inflammatory.Leeds scores range from 0 (least severe) to 10 (most severe) though modified scales have a maximum score of 12.