IF relative contribution. For each sample the entire HTF-Microbi.Array probe set was considered and their relative IF contribution was calculated as percentage of the total IF. Sub-probes were excluded and for each subject data from two separate LDR-universal array experiments were taken onto consideration. The averaged IF from both the LDR-Universal Array experiments was considered. The principal intestinal groups of major mutualistic symbionts are indicated: Bacteroides/Prevotella (B/P) blue, Clostridium cluster IV (Cl.IV) green, Clostridium cluster IX (Cl.IX) brown, Clostridium cluster XIVa (Cl.XIVa) dark brown. Lactobacillus, B. clausii, B. subtilis, Fusobacterium and Cyanobacteria are grouped as minor mutualistic symbionts (minor) indicated in yellow. Proteus, Yersinia and E. faecalis are grouped as opportunistic pathogens (opp) in red.