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Krause M, Morabito JE, Mackensen GB, Perry TE, Bartels K.Krause M, et al. Among authors: bartels k.Anesth Analg. 2020 Aug;131(2):518-526. doi: 10.1213/ANE.0000000000004601.Anesth Analg. 2020.PMID: 31880633Free PMC article.