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Freiberger E, Sieber C, Pfeifer K.Freiberger E, et al.Wien Med Wochenschr. 2011 Sep;161(17-18):416-25. doi: 10.1007/s10354-011-0001-z. Epub 2011 Jul 29.Wien Med Wochenschr. 2011.PMID: 21792532Review.
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