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Top 10 most frequently visited physician-rating websites as a relative measure of Web traffic as measured through Google Trends (October-December 2010)
| Website | Percentage | Daily unique visits (per Google Trends) |
| HealthGrades | 40% | 254,600 |
| Vitals | 20% | 127,300 |
| Yelp | 15% | 95,475 |
| Checkbook | 7% | 44,555 |
| YP | 5% | 31,825 |
| ZocDoc | 4.8% | 30,552 |
| AngiesList | 3.2% | 20,368 |
| RateMD | 3% | 19,095 |
| RevolutionHealth | 1% | 6365 |
| Kudzu | 1% | 6365 |
| Total | 100% | 636,500 |
