Composition, variability, and temporal stability of the intestinal microbiota of the elderlyClaesson, M. J.; Cusack, S.; O'Sullivan, O.; Greene-Diniz, R.; de Weerd, H.; Flannery, E.; Marchesi, J. R.; Falush, D.; Dinan, T.; Fitzgerald, G.; Stanton, C.; van Sinderen, D.; O'Connor, M.; Harnedy, N.; O'Connor, K.; Henry, C.; O'Mahony, D.; Fitzgerald, A. P.; Shanahan, F.; Twomey, C.; Hill, C.; Ross, R. P.; O'Toole, P. W. · Proceedings of the National Academy of Sciences · 2011