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25. Confounding and effect modification: possible explanation for variation in the results on the association between oral and systemic diseases. Ylöstalo PV; Knuuttila ML J Clin Periodontol; 2006 Feb; 33(2):104-8. PubMed ID: 16441733 [TBL] [Abstract][Full Text] [Related]
26. [Findings in studies on the marginal and apical periodontium of crowned teeth]. Arnold M DDZ; 1966 Nov; 20(21):688-96. PubMed ID: 5224123 [No Abstract] [Full Text] [Related]
27. [Today's position on etiology and pathogenesis of periodontal diseases]. Topoll HH ZWR; 1989 Jun; 98(6):535-8. PubMed ID: 2697126 [TBL] [Abstract][Full Text] [Related]
28. [Deep parodontopathies in young subjects]. Knychalska-Karwan Z; Jakób-Doleźal K; Pelcowa M; Prostak-Kosowska K; Franaszek E Czas Stomatol; 1977; 30(10):875-81. PubMed ID: 269785 [No Abstract] [Full Text] [Related]