title: IonXpress Sequence Data: The female upper reproductive tract harbors endogenous microbial profiles
design: DNA extraction from the stored samples was performed with Maxwell RSC PureFood GMO and Authentication Kit and Maxwell RSC Equipment (Promega, USA). The multiplex PCR using Ion Torrent 16S Metagenomics kit (Thermo Fisher Scientific Inc., USA) was used to amplify the 16S 148 rRNA gene, using two sets of primers, which targeted the regions V2, V4, and V8, and V3, V6-7, and V9.