V2 (Randomization) examination / verification of participation criteria / randomization Cystatin C collection / Biology Hypoglycemia notification / QAPPA / RPAQ / NAQA / Questionnaires (EQ-5D3L, SF12, Rosenberg Self esteem) / Accelerometer (ancillary) / Impedance-meter (ancillary) 6-minute step test / 10-meter walk test