Southern European Prospective Investigation Into Childhood Cancer and Nutrition (EPICkids): Study design and protocol - Foteini Perganti; Inge Huybrechts; Adriana Cristina Balduzzi; Ronald Barr; Andrea Biondi; Aina Llenas Bladé; Evangelina Muñoz Bravo; Erika Damasco; Christina N. Katsagoni; Antonis Kattamis; Alvaro Lassaletta; Marta Llopis Lera; et al. (PLoS ONE, 2025)