Vitamin B12, folate, and homocysteine levels in children and adolescents with obesity: a systematic review and meta-analysis - Ulloque-Badaracco, Juan R.; Alarcon-Braga, Esteban A.; Hernandez-Bustamante, Enrique A.; Von-Koeller-Jones, Beatrix M.; Huayta-Cortez, Miguel; Saavedra-Custodio, Esduardo; Herrera-Añazco, Percy; Benites-Zapata, Vicente A. (Frontiers in Public Health, 2025)