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Berendes E, Möllhoff T, Van Aken H, Schmidt C, Erren M, Deng MC, Weyand M, Loick HM.Berendes E, et al. Among authors: loick hm.Anesth Analg. 1997 May;84(5):950-7. doi: 10.1097/00000539-199705000-00002.Anesth Analg. 1997.PMID: 9141914Clinical Trial.