Microbiome-derived carnitine mimics as previously unknown mediators of gut-brain axis communication by Hulme, H, Meikle, LM, Strittmatter, N, van der Hooft, JJJ, Swales, J, Bragg, RA, Villar, VH, Ormsby, MJ, Barnes, S, Brown, SL, Dexter, A, Kamat, MT, Komen, JC, Walker, D, Milling, S, Osterweil, EK, MacDonald, AS, Schofield, CJ, Tardito, S, Bunch, J, Douce, G, Edgar, JM, Edrada-Ebel, R, Goodwin, RJA, Burchmore, R, Wall, DM