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Fardal, Øystein; Fardal, Patrick; Persson, G. Rutger (2013). Periodontal and general health in long-term periodontal maintenance patients treated in a Norwegian private practice: a descriptive report from a compliant and partially compliant survivor population. Journal of periodontology, 84(10), pp. 1374-1381. American Academy of Periodontology 10.1902/jop.2012.120416
