Implementation {16c}
The pairs associating two centers were constituted by taking into account the level of activity, i.e., the number of dialysis patients managed and the number of caregivers present. The allocation of a pair in the group to the experimental group (or not) was done by computerized random draw. The randomization was conducted by the Clinical Research Department of the University Hospital Center of Caen. Four centers were in the control group, and 4 centers were in the experimental group.To organize the training for each pair of centers, randomization was conducted by the Clinical Research Department of the University Hospital Center of Caen. Four centers were in the control group, and 4 centers were in the experimental group.