Subject compliance and safety analysis Adherence to study medication and adverse events were assessed by at least monthly interviews during and at the end of the study period. Adverse events were reversible and generally mild in nature, and are listed in Tables 2 and 3. Throughout the study period, no severe adverse events were observed, and there were no drug interactions with the immunosuppressants. Kidney function as assessed by estimated GFR (MDRD formula) was not influenced by the treatment in either of the study arms. Liver function parameters did not show any differences between the groups at months 3 or 4 (Table 2).