B-cell precursors:NFr:Pt:Bone mar:Qn:Flow cytometry
b-cell precursors:nfr:pt:bone mar:qn:flow cytometry
B-cell precursors:Number Fraction:To identify measures at a point in time:Marrow (bone):Quantitative:Flow cytometry
b-cell precursors:number fraction:to identify measures at a point in time:marrow (bone):quantitative:flow cytometry