| Rank | Referring Site | Accesses | % | Bytes | % |
|---|---|---|---|---|---|
| 1 | http://www.google.com | 5,098 | 22.50 | 194,936,871 | 22.63 |
| 2 | http://search.yahoo.com | 1,464 | 6.46 | 59,492,198 | 6.90 |
| 3 | http://cmgm.stanford.edu:80 | 910 | 4.02 | 19,831 | 0.00 |
| 4 | http://images.google.com | 879 | 3.88 | 66,514,331 | 7.72 |
| 5 | http://www.stanford.edu | 838 | 3.70 | 5,087,555 | 0.59 |
| 6 | http://find.stanford.edu | 725 | 3.20 | 71,919,365 | 8.35 |
| 7 | http://steinmanlab.stanford.edu | 706 | 3.12 | 5,385,340 | 0.63 |
| 8 | http://falkow.stanford.edu | 596 | 2.63 | 402,236 | 0.05 |
| 9 | http://falkow | 502 | 2.22 | 333,830 | 0.04 |
| 10 | http://search.msn.com | 487 | 2.15 | 8,054,785 | 0.93 |
| 11 | http://zebrafish.stanford.edu | 404 | 1.78 | 330,900 | 0.04 |
| 12 | http://www.google.ca | 399 | 1.76 | 13,540,107 | 1.57 |
| 13 | http://171.65.21.3 | 325 | 1.43 | 110,481,726 | 12.82 |
| 14 | http://www.google.de | 324 | 1.43 | 20,637,450 | 2.40 |
| 15 | http://brownlab.stanford.edu | 238 | 1.05 | 19,372,288 | 2.25 |
| 16 | http://www.bio.davidson.edu | 208 | 0.92 | 472,227 | 0.05 |
| 17 | http://www.google.com.au | 177 | 0.78 | 14,647,980 | 1.70 |
| 18 | http://www.google.fr | 163 | 0.72 | 8,982,848 | 1.04 |
| 19 | http://www.google.co.uk | 155 | 0.68 | 8,070,249 | 0.94 |
| 20 | http://www.protocol-online.org | 155 | 0.68 | 1,154,520 | 0.13 |
| 21 | http://www.altavista.com | 131 | 0.58 | 13,080,796 | 1.52 |
| 22 | http://www.google.co.jp | 117 | 0.52 | 9,647,519 | 1.12 |
| 23 | http://www.google.it | 117 | 0.52 | 12,012,681 | 1.39 |
| 24 | http://images.google.de | 111 | 0.49 | 4,982,411 | 0.58 |
| 25 | http://pmgm2.stanford.edu | 100 | 0.44 | 75,272 | 0.01 |