Grading the evidence on the effects of exercise interventions in children and adolescents during and beyond cancer treatment: an umbrella review of systematic reviews with meta-analyses - Ruiz-Campos,S.; Sanchez-Gomez,J.; Ruiz-González,D.; León-Rodríguez,A.; Sánchez,J.L.S.; Rodriguez-Solana,A.; Soriano-Maldonado,A.; Martínez-Tellez,B.; Valenzuela,P.L.; Morales,J.S. (British Journal of Sports Medicine, 2026)