methods Post-traumatic stress disorder in children Treatment Adolescent Adolescent psychology Adolescents Child Children Cognitive therapy for children Cognitive therapy for teenagers Diagnosis Enfants Evidence-Based Practice État de stress post-traumatique chez l'adolescent État de stress post-traumatique chez l'enfant Jeunes adultes Jeunesse MEDICAL Mental health services Methodology Méthodologie Mindfulness Mindfulness-based cognitive therapy Pediatrics Post-traumatic stress disorder in adolescence Psychologie Psychology, Adolescent Psychotherapy Psychothérapie Services de santé mentale