Effect of three enteral diets with different protein contents on protein metabolism in critically ill infants: a randomized controlled trial Reyes Fernández Montes; Javier Urbano Villaescusa; Ángel Carrillo Álvarez; Ana Vivanco Allende; María José Solana García; Susana Díaz Coto; Corsino Rey Galán; Jesús López-Herce Cid;