School-based diet and physical activity interventions and weight-related outcomes among children and adolescents in Africa: a systematic review and meta-analysis - Barbara Adimchinobi Onyeonu; Favour Chiamaka Kalu; Kosisochukwu Chidinma Igbokwe; Uzoamaka Victoria Thomspon; Favour Chidinma Okezie; Anuoluwapo Funmilayo Taiwo; Gideon Onyedikachi Iheme (BMC Public Health, 2026)