CD39 + CD8 + T cell numbers are increased in Crohn's disease (CD). ( a , b ) Flow cytometric analyses of CD39 expression on CD8 + T cells in peripheral blood (PB) ( a ) or lamina propria (LP) ( b ) of healthy volunteers, patients with active and inactive CD ( n =29, 35 or 25 for peripheral blood; 10, 28 or 9 for lamina propria, respectively). Numbers in quadrants indicate percentage of the cells in the designated gates. Data are presented as means±s.e.m., * P
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