GSTM1 and anemia (phenotype): Tsai et al. reported in a large cohort of MM patients that light chain disease (HR 6.74), severe anemia (Hb < 80 g/L) (HR 3.34), serum hypoalbuminemia (HR 3.24), and allogenic SCT (HR 5.98) were independent predictors of invasive fungal infections in MM patients [41].