| Name | Info | Provider | Link |
|---|---|---|---|
| Tracheal Disorders | free resource | MedlinePlus Health Information | https://medlineplus.gov/trachealdisorders.html |
| subscription/membership/fee required | Masson (France) | http://www.em-consulte.com/retrieve/pii/MDOI-RPC-02-2003-59-1-0761-8417-101019-ART7 |