| Name | Info | Provider | Link |
|---|---|---|---|
| Allergy | free resource | MedlinePlus Health Information | https://medlineplus.gov/allergy.html |
| subscription/membership/fee required | Ovid Technologies, Inc. | http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=16316424.ui | |
| free resource | Wiley | https://onlinelibrary.wiley.com/doi/10.1111/j.1365-3083.2005.01710.x |