Eur. j. pediatr. Eur. j. pediatr. A Mediterranean lifestyle obesity prevention intervention in preschoolers at risk: MELI-POP Study—a randomized controlled trial Larruy-García A. Miguel-Etayo P. de Gil-Campos M. Esteban L. M. Picáns-Leis R. Pastor-Villaescusa B. Vázquez-Cobela R. Flores-Rojas K. Leis R. Moreno L. A. 2026 research-article