Hepatitis B Patients Under Oral Nucleos(t)Ide Treatment With Intermittent Assessment of Kidney Function (BONIKA)

Patients with chronic Hepatitis B who are under oral antiviral treatment for at least 6 months at study start will be monitored once yearly for kidney function changes within their routine outpatient visit. Therefore urine samples will be collected and some additional blood test will be done within the routine blood sampling.