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Andersen MS, Nielsen TT, Christensen EF.Andersen MS, et al. Among authors: christensen ef.Emerg Med J. 2006 Sep;23(9):705-6. doi: 10.1136/emj.2006.034652.Emerg Med J. 2006.PMID: 16921086Free PMC article.
Fjaeldstad A, Kirk MH, Knudsen L, Bjerring J, Christensen EF.Fjaeldstad A, et al. Among authors: christensen ef.Dan Med J. 2013 Jul;60(7):A4666.Dan Med J. 2013.PMID: 23809975Free article.Clinical Trial.