For all patients, the compliance rate to weekly blood test and to the drug were calculated. Consulting the computerized clinical record WebThal, we counted the total amount of blood exams carried out during the DFP administration period. For every blood count done beyond the scheduled limit of ten days, we reported the reason for the delay. In case of unmedical reasons (e.g.impossibility to do the exam on holiday) the exam was considered as missing; the total number of missing exams was expressed as percentage and used to calculate the compliance.The same methodology was applied to assess the rate of medication adherence considering the times the drug was self-suspended and, as a consequence, blood count was not taken.