| Name | Info | Provider | Link |
|---|---|---|---|
| Carcinoid Tumors | free resource | MedlinePlus Health Information | https://medlineplus.gov/carcinoidtumors.html |
| free resource | PubMed Central | https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/23117235/ | |
| free resource | Europe PubMed Central | https://europepmc.org/abstract/MED/23117235 | |
| subscription/membership/fee required | Silverchair Information Systems | https://academic.oup.com/icvts/article-lookup/doi/10.1093/icvts/ivs419 |