Figure 16: Response of peripheral blood mononuclear cells (PBMCs) to recombinant trigger factor protein (RP35) from P. acnes and purified protein derivative (PPD) from M. tuberculosis. The horizontal bars show, from bottom to top, the 25th percentile, median, and 75th percentile, respectively. The dotted lines show the threshold, set at the mean + 3SD of the 32 control samples. Sar: Sarcoidosis ( = 50), TB: tuberculosis ( = 21), RA: rheumatoid arthritis ( = 32), and Cont: healthy volunteer ( =32).