Correlation between CD11b and GFAP expression in ventral horn. Changes in GFAP and CD11b in lumbar ventral horn detected with dual immunofluorescence throughout disease progression. (A,B) The extent relative to intensity of CD11b (A) and GFAP (B) expression. (C) The extent of expression of CD11b relative to GFAP expression. (D) The tissue intensity of CD11b relative to GFAP expression.