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Müller JU, Semmel T, Stepan R, Seyfried TF, Popov AF, Graf BM, Wiese CH.Müller JU, et al. Among authors: graf bm.Emerg Med J. 2013 Dec;30(12):1012-6. doi: 10.1136/emermed-2012-201923. Epub 2013 Jan 10.Emerg Med J. 2013.PMID: 23307754