Prospectively identified phenotypic, molecular or functional biomarkers will then be tested, in a subsequent study, from biological materials prospectively collected within the French wide CryoStem cohort. Thus, as the final task of this project, we will perform statistical analyses taking into account confounding clinical variables influencing the outcome (i.e. GVHD-related death or tolerance). Preparing for a clinical trial will need moving from classical Bioinformatics analyses into clinically relevant statistical analyses that include sequential biological measurement in the discovery set cohort. Main points that will be taken into accounts for this task are the followings;