 - Six-minute-walk test to complement the assessment of exercise tolerance: This test is performed on the patients in the intervention group at baseline, at discharge from hospital for transplantation, at the month of discharge, and at 3, 6, and 12 months, in order to assess the exercise tolerance described in meters traveled, percentage of normality, symptomatology dyspnea fatigue of legs, and heart rate recovery. The abrupt weight changes in this population will be decisive for the interpretation of these data. 