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Lulic, Martina; Leiggener Görög, Isabelle; Salvi, Giovanni E; Ramseier, Christoph A; Mattheos, Nikolaos; Lang, Niklaus P (2009). One-year outcomes of repeated adjunctive photodynamic therapy during periodontal maintenance: a proof-of-principle randomized-controlled clinical trial. Journal of clinical periodontology, 36(8), pp. 661-666. Frederiksberg (DK): Wiley 10.1111/j.1600-051X.2009.01432.x
