Among Multiple Mental Health Symptoms, Only Attention Deficit/Hyperactivity Problems Predict Poorer BMI Outcomes in Family‐Based Behavioural Treatment for Youth With Severe Obesity - Vilde A. Skodvin; Hanna F. Skjåkødegård; Helge Molde; Denise Wilfley; Rachel P. K. Conlon; Pétur B. Júlíusson; Yngvild S. Danielsen (Pediatric Obesity, 2026)