Patienterne i undersøgelsen med empirisk behandling havde modtaget kemoterapi for malignitet eller havde fået hæmatopoietisk stamcelle transplantation (inklusiv 39 allogene transplantationer).
In the empirical therapy study patients had received chemotherapy for malignancy or had undergone hematopoietic stem-cell transplantation (including 39 allogeneic transplantations).