Slackia equolifaciens Jin et al. 2010 Jin J.-S. Kitahara M. Sakamoto M. Hattori M. Benno Y. Slackia equolifaciens sp. nov., a human intestinal bacterium capable of producing equol 2010 60 8 1721 1724 International Journal of Systematic and Evolutionary Microbiology Int J Syst Evol Microbiol 1466-5026 1466-5034 10.1099/ijs.0.016774-0 19734283