“…With respect to the homogeneity of the sample, we restricted our study to leukemia patients and allogeneic transplantation. Regarding psychosocial factors and survival in this circumscribed group of patients, no other prospectively designed study [27][28][29][30][31][32][33][34][35][36] includes a larger (sub-) sample or had a longer follow-up period. Furthermore, we paid special attention to the control for somatic variables by considering well-known hematological risk factors [24].…”