title: Effect of sampling on the composition of the human subgingival microbial flora.
mesh_terms: D000328:Adult; D001419:Bacteria / Q000302:isolation & purification; D001431:Bacteriological Techniques; D005881:Gingiva / Q000382:microbiology*; D006801:Humans; D008875:Middle Aged; D009910:Oral Hygiene; D010512:Periodontal Index; D010518:Periodontitis / Q000382:microbiology; D013048:Specimen Handling