836 Murine fecal microbiota transfer models colonize human microbes selectively and reveal transcriptional pathways associated with response to neoadjuvant checkpoint inhibitors by James White, Patrick Forde, Juan Fu, Drew Pardoll, Franck Housseau, Cynthia Sears, Richard Blosser, Sudipto Ganguly, Fyza Shaikh, Joell Gills, Fuad Mohammad, Courtney Stevens, Hua Ding, Tatianna Larman