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Niebisch, S., F. J. Fleming, K. M. Galey, C. L. Wilshire, C. E. Jones, V. R. Litle, T. J. Watson, and J. H. Peters. "Perioperative Risk of Laparoscopic Fundoplication: Safer than Previously Reported—Analysis of the American College of Surgeons National Surgical Quality Improvement Program 2005 to 2009." JOURNAL - AMERICAN COLLEGE OF SURGEONS 215, no. 1 (2012): 61-68.

Niebisch, S., et al. "Perioperative Risk of Laparoscopic Fundoplication: Safer than Previously Reported—Analysis of the American College of Surgeons National Surgical Quality Improvement Program 2005 to 2009." JOURNAL - AMERICAN COLLEGE OF SURGEONS, vol. 215, no. 1, 2012, pp. 61-68.