| Name | Info | Provider | Link |
|---|---|---|---|
| free resource | Aran ediciones, S.L. | http://www.grupoaran.com/mrmUpdate/lecturaPDFfromXML.asp?IdArt=458060&TO=RVN&Eng=0 | |
| Gastrointestinal Bleeding | free resource | MedlinePlus Health Information | https://medlineplus.gov/gastrointestinalbleeding.html |