Study approval.
This study was designed by investigators at Cliniques universitaires Saint-Luc, Brussels, Belgium and approved by the Biomedical Ethical Committee of the 5 hospitals involved in the study (Brussels, Belgium, and Amiens, Caen, Montpellier, and Paris, France). Each patient, or for minors, both parents of the patient, signed an informed consent after having received the patient information form adapted to patient’s age with explanations from a study nurse and the physician, and a summary explaining the procedure of the study.