Patterns of the immune response in peripheral blood and mucosal tissue samples from HIV-infected persons. (A) Cellular parameters measured by flow cytometry and individual samples were organized using hierarchic clustering. Each row represents a single cellular parameter and each column represents a single person. Black indicates the median values of each parameter; red, a value greater than the median; green, a value lower than the median; and gray, missing data. Horizontal bars (in blue for controllers and red for noncontrollers) at the bottom of the figure indicate that the samples from controllers and noncontrollers cluster together. Vertical brackets (at the right) indicate cellular parameters that cluster together, reflecting values that are closely related to each other. (B) Representative scatter plots with linear regression analysis to confirm the association between cellular parameters measured in the peripheral blood (PB) relative to those measured in rectosigmoid biopsies (RB).