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Rahn R, Thomaidis G, Frenkel G, Frank P, Kinner U.Rahn R, et al. Among authors: frenkel g.Dtsch Z Mund Kiefer Gesichtschir. 1989 May-Jun;13(3):197-202.Dtsch Z Mund Kiefer Gesichtschir. 1989.PMID: 2625010German.
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