Factors associated with the need of parenteral nutrition in critically ill patients after the initiation of enteral nutrition therapy oleh Juan Carlos Lopez-Delgado, Juan Carlos Lopez-Delgado, Lluís Servia-Goixart, Lluís Servia-Goixart, Teodoro Grau-Carmona, Teodoro Grau-Carmona, Luisa Bordeje-Laguna, Esther Portugal-Rodriguez, Carolina Lorencio-Cardenas, Paula Vera-Artazcoz, Laura Macaya-Redin, Juan Francisco Martinez-Carmona, Judith Marin Corral, Jose Luis Flordelís-Lasierra, Carlos Seron-Arbeloa, Maravillas de las Nieves Alcazar-Espin, Elisabeth Navas-Moya, Sara Aldunate-Calvo, Beatriz Nieto Martino, Itziar Martinez de Lagran