Additional file 1: of Optimizing methods and dodging pitfalls in microbiome research KimDorothy HofstaedterCasey ZhaoChunyu MatteiLisa TanesCeylan ClarkeErik LauderAbigail Sherrill-MixScott ChehoudChristel KelsenJudith ConradMåire CollmanRonald BaldassanoRobert BushmanFrederic BittingerKyle 2017 Supplementary methods. (PDF 1926 kb)