Benefits of the Involvement of Nurses in Meetings Between Physicians and the Families of Patients in the ICU.

-Randomized trial with two arms: arm 1: information is delivered by a team (physician and nurse) arm 2: information is delivered by the physician alone -During the different meetings of the study: at day 1, at day 3, weekly and in case of deterioration of the patient condition. The other days, family information is delivered as usually in both arms.