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Friedrich-Rust M, Forestier N, Sarrazin C, Reesink HW, Herrmann E, Zeuzem S.Friedrich-Rust M, et al. Among authors: zeuzem s.Ultrasound Med Biol. 2007 Sep;33(9):1362-7. doi: 10.1016/j.ultrasmedbio.2007.02.017. Epub 2007 Apr 27.Ultrasound Med Biol. 2007.PMID: 17467151