Topographical continuity of bacterial populations in the healthy human respiratory tract
American Journal of Respiratory and Critical Care Medicine (2011) - Comments
pubmed: 21680950  doi: 10.1164/rccm.201104-0655oc  issn: 1535-4970  issn: 1073-449x 

Emily S. Charlson, Kyle Bittinger, Andrew R. Haas, Ayannah S. Fitzgerald, Ian Frank, Anjana Yadav, Frederic D. Bushman, Ronald G. Collman