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Hartl WH, Jauch KW, Parhofer K, Rittler P; Working group for developing the guidelines for parenteral nutrition of The German Association for Nutritional Medicine.Hartl WH, et al.Ger Med Sci. 2009 Nov 18;7:Doc17. doi: 10.3205/000076.Ger Med Sci. 2009.PMID: 20049074Free PMC article.Review.