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de Groot JJA, Maessen JMC, Dejong CHC, Winkens B, Kruitwagen RFPM, Slangen BFM, van der Weijden T; all the members of the study group.de Groot JJA, et al.World J Surg. 2018 Aug;42(8):2348-2355. doi: 10.1007/s00268-018-4495-z.World J Surg. 2018.PMID: 29387957Free PMC article.