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Hoffmann O, Zafiropoulos GG.Hoffmann O, et al. Among authors: zafiropoulos gg.J Oral Implantol. 2012 Apr;38(2):194-200. doi: 10.1563/AAID-JOI-D-10-00071. Epub 2010 Nov 23.J Oral Implantol. 2012.PMID: 21091344Review.
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