Principal-coordinate analysis done for the taxonomy profiling results of all the samples, with the Russian (solid dots) and Finnish (open circles) groups done with genus-level taxonomy assignment and deepest-achieved-taxonomy assignment. Principal-coordinate analysis done for the taxonomy profiling results of all the samples, with the Russian (solid dots) and Finnish (open circles) groups done with genus-level taxonomy assignment and deepest-achieved-taxonomy assignment. Jan Majta et al. mSphere 2019; doi:10.1128/mSphereDirect.00152-19