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Peterli, R; Borbely, Y; Kern, B; Gass, M; Peters, T; Thurnheer, M; Schultes, B; Laederach, K; Bueter, M; Schiesser, M (2013). Early Results of the Swiss Multicentre Bypass Or Sleeve Study (SM-BOSS): A Prospective Randomized Trial Comparing Laparoscopic Sleeve Gastrectomy and Roux-en-Y Gastric Bypass. Annals of surgery Hagerstown, Md.: Lippincott Williams & Wilkins