| Query | User |
|---|---|
| asthma and nitrous oxide | entered by user 6278904 |
| nitrous oxide and asthma | entered by user ditto |
| pain free dentists | entered by user 8310125 |
| painfree dentists | entered by user ditto |
| sedation | entered by user 1343429 |
| sedation dentistry | entered by user 676248 |
| sedation dentistry | entered by user 5052007 |
| sleep sedation dentistry | entered by user 3944948 |