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Comparison of the prevalence of 4 periodontopathogens in supra- and subgingival plaque of young adults without periodontitis
Jang,Hyun-Seon et al.
The Journal of the Korean Academy of Periodontology(2003), 33 (2):159
http://dx.doi.org/10.5051/jkape.2003.33.2.159