We read with interest the paper by Svensson et al.  regarding IgG subclass deficiency in chronic lymphocytic leukaemia (CLL). In contrast to our study , Svensson et al. failed to find an association between infection with either IgG subclass deficiency or hypogammaglobulinaemia (reduced total IgG level), while our study found an association with both.
- *epidemiology Communicable Diseases
- *epidemiology Female Humans Immunoglobulin G
- *blood Leukemia
- complications Male