*2.7.1 Cohort*

The cohort consisted of 169 adult and paediatric malignant patients from three Slovak bone marrow transplantation centres who underwent allo-hSCT between the years 1993 and 2010, and chimerism analysis of polymorphic STR markers was performed by 'FA'. A prospective evaluation of chimerism was performed in 171 patients transplanted after the year 2003 also by 'FA' from fresh or frozen DNA samples which were available.
