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Baumgartner, Stefan; Imfeld, Thomas; Schicht, Olivier; Rath, Christian; Persson, Rigmor E; Persson, G Rutger (2009). The impact of the stone age diet on gingival conditions in the absence of oral hygiene. Journal of periodontology, 80(5), pp. 759-68. Chicago, Ill.: American Academy of Periodontology 10.1902/jop.2009.080376
Fischer, Carolin C; Persson, Rigmor E; Persson, G Rutger (2008). Influence of the menstrual cycle on the oral microbial flora in women: a case-control study including men as control subjects. Journal of periodontology, 79(10), pp. 1966-73. Chicago, Ill.: American Academy of Periodontology 10.1902/jop.2008.080057
