Classification analysis confirmed clinical responding and non-responding patients as two distinct groups. Principal components (pc) were calculated from the logarithms of the steroid response data received from the qPCR analyses of CD163, TSP-1 and IL-6 and pc1 against pc2 was plotted. (R) Clinical responder. (N) Clinical non-responder. (H) Healthy volunteer. Circles present subjects whose pc data are differing from their respective group.