Non-nutritive sweeteners and body weight in children with type 1 and type 2 diabetes: a critical narrative review of current evidence, methodological challenges, biological mechanisms, and clinical implications - Sousana K. Papadopoulou; Exakousti-Petroula Angelakou; Theodosios Koimtsidis; Eleni Pavlidou; Dimitrios Tasoulas; Constantinos Giaginis (Frontiers in Nutrition, 2026)