| Referrer | Total referrals | 2025-04 | 2025-03 | 2025-02 | 2025-01 |
|---|---|---|---|---|---|
| 344,642 | 80,574 | 86,474 | 95,281 | 82,313 | |
| nih.gov | 37,943 | 10,221 | 10,629 | 9,467 | 7,626 |
| pathologyoutlines.com | 28,662 | 6,319 | 6,557 | 7,021 | 8,765 |
| eScholarship | 26,470 | 5,672 | 9,976 | 5,923 | 4,899 |
| cdlib.org | 8,048 | 1,787 | 2,645 | 2,633 | 983 |
| Bing | 6,310 | 1,772 | 1,945 | 1,305 | 1,288 |
| doi.org | 4,734 | 846 | 1,678 | 1,330 | 880 |
| chatgpTwitterm | 4,297 | 1,466 | 1,240 | 892 | 699 |
| baidu.com | 3,535 | 309 | 1,025 | 1,162 | 1,039 |
| ablesci.com | 3,489 | 687 | 627 | 964 | 1,211 |
| duckduckgo.com | 1,802 | 557 | 438 | 286 | 521 |
| Wikipedia | 1,108 | 367 | 443 | 298 | |
| perplexity.ai | 1,075 | 486 | 319 | 270 | |
| 938 | 291 | 206 | 267 | 174 | |
| reddiTwitterm | 734 | 256 | 266 | 212 | |
| yandex.ru | 669 | 248 | 187 | 234 | |
| Yahoo | 611 | 225 | 186 | 200 | |
| curezone.org | 406 | 128 | 98 | 97 | 83 |
| panda985.com | 335 | 200 | 135 | ||
| clarivate.cn | 282 | 188 | 94 | ||
| journalofwritingassessment.org | 228 | 120 | 108 | ||
| ucdavis.edu | 199 | 186 | 13 | ||
| ebsco.com | 188 | 100 | 88 | ||
| pressbooks.pub | 170 | 83 | 87 | ||
| 155 | 155 | ||||
| other | 35,806 | 8,833 | 9,854 | 8,188 | 8,931 |
Note: Due to the evolving nature of web traffic, the data presented here should be considered approximate and subject to revision. Learn more.