Control condition
Participants in the CG did not receive any intervention but, like those in the EG, were entitled to receive support from the usual health-care system (e.g. parent counselling centres, family doctor). Participants of the CG were offered the intervention as a written document after completing T4 (15 months from baseline). Anecdotally, families in both groups reported that they received support from their family doctor or counselling centres, although this was not systematically evaluated.