title: 16S rRNA sequencing of biofilms collected from tubes of dental unit waterlines: high-speed handpiece, at baseline before clinical use
design: 16S rRNA gene V3-V4 region amplification using primers 341F (CCTACGGGNGGCWGCAG) and 805R (GACTACHVGGGTATCTAATCC), followed by amplicon library preparation and paired-end sequencing on DNBSEQ-G99 platform.