Outcome and cost-effectiveness of perioperative enteral immunonutrition in patients undergoing elective upper gastrointestinal tract surgery: a prospective randomized study.
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A. Frei | G. Wolfram | M. Senkal | V. Zumtobel | B. Marpe | M. Kemen | K. Bauer | G. Wolfram | U. Eickhoff | Ulrich Eickhoff | Matthias Kemen | M. Kemen | Günther Wolfram