CD34 and chronic graft versus host disease: There was no statistically significant difference between the HC and non-HC group for the following variables: sex (p = 0.237); age (p = 0.304); MAC conditioning (p = 0.932); TBI in the conditioning (p = 0.906); number of CD34 cells (p = 0.227); MUD donor (p = 0.874); donor’s age (p = 0.273); donor’s sex (p = 0.609); chronic GVHD (p = 0.139).