Inborn errors of intermediary metabolism (IEiM) are complex diseases with high clinical heterogeneity. and some patients who have severe enzyme deficiencies or are subjected to stress (catabolism/infections) actually decompensate in the neonatal period. In this study. we performed metabolic tests on 2025 newborns in Mexico admitted to 35 neonatal intensive care units or emergency ward... https://www.jmannino.com/