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Abou-Shady M, Baer HU, Friess H, Zimmermann A, Büchler MW.Abou-Shady M, et al. Among authors: zimmermann a.Swiss Surg. 1999;5(3):102-6. doi: 10.1024/1023-9332.5.3.102.Swiss Surg. 1999.PMID: 10414179Review.