| Name | Info | Provider | Link |
|---|---|---|---|
| Gastrointestinal Bleeding | free resource | MedlinePlus Health Information | https://medlineplus.gov/gastrointestinalbleeding.html |
| subscription/membership/fee required | Ovid Technologies, Inc. | http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=15764876.ui | |
| subscription/membership/fee required | Wolters Kluwer | https://dx.doi.org/10.1097/01.rlu.0000155984.14938.28 |