V8 (24 months) / premature discontinuation examination / Hypoglycemia notification / QAPPA / RPAQ / NAQA / M/F LUTS / Questionnaires (EQ-5D3L, SF12, Rosenberg Self esteem) / ECG / Accelerometer (ancillary) / Impedance-meter (ancillary) 6-minute step test / 10-meter walk test Cystatin C collection / Biology