the lymphocytes infiltrating the liver were isolated and characterized as t or b cells in three groups of patients : 20 patients with hepatitis b surface antigen ( hb sag ) -positive acute and chronic hepatitis , 8 patients with hbsag-negative chronic hepatitis with prior evidence for hepatitis b virus ( hbv ) infection , and 5 patients with hbsag-negative chronic hepatitis without prior evidence for hbv infection .
C0023884
liver
C0019189
chronic hepatitis