Frequency of expansion of individual Vβ families in AA.

Results represent a summary of all patients analyzed by flow cytometry. Columns correspond to percentage of cases in which the pathologic expansion was found. Results in total αβ CD4⁺ (A,B,C,D) and αβ CD8⁺ (G,H,I) cells are represented. By analogy, results within the effector (CD28^dim) pool for CD4⁺ (D,E,F) and CD8⁺ (J,K,L) lymphocytes are depicted.