<qa>  What is the name of the sample that is collected periodically for biomarker analysis?Blood samples are collected periodically for biomarker analysis. Samples are analyzed for protein expression i.e., CD38, CD20, and ZAP70 by flow cytometry; quantitative immunoglobulins, β2-microglobulin, and T-cell subsets by electrophoresis; IgVH mutation status; and cytogenetics i.e., 12, del 13q, del 11q, and del 17p by FISH. 