deletions | additions       diff --git a/bibliography/biblio.bib b/bibliography/biblio.bib  index 913692a..462c307 100644  --- a/bibliography/biblio.bib  +++ b/bibliography/biblio.bib 
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pages = {287-91},  pubmed_id = {22018227},  }  @article{Costello_2009,  doi = {10.1126/science.1177486},  url = {http://dx.doi.org/10.1126/science.1177486},  year = {2009},  month = {Nov},  publisher = {American Association for the Advancement of Science (AAAS)},  volume = {326},  number = {5960},  pages = {1694-1697},  author = {E. K. Costello and C. L. Lauber and M. Hamady and N. Fierer and J. I. Gordon and R. Knight},  title = {{Bacterial Community Variation in Human Body Habitats Across Space and Time}},  journal = {Science},  }