Monge-Rojas, Rafael, Ricardo Alvarado-Barrantes, Rulamán Vargas-Quesada, and Anne Chinnock. 2024. “Validity and Reliability of a Food Frequency Questionnaire (FFQ) Assessing Food Groups Consumption and Nutrients Intake in Costa Rican Adolescents”. Población Y Salud En Mesoamérica 21 (2). https://doi.org/10.15517/psm.v21i2.55311.