the mean sister chromatid exchange frequencies in bone marrow and peripheral blood of untreated patients were 3.93 +/- 0.7/cell and 4.09 +/- 0.91/cell , respectively , which were not significantly different from those of normal subjects ( 3.22 +/- 0.7/cell and 5.16 +/- 1.3/cell in bone marrow and peripheral blood , respectively ) .
C0005953
bone marrow
C0005955
cell