| Name | Info | Provider | Link |
|---|---|---|---|
| Fistulas | free resource | MedlinePlus Health Information | https://medlineplus.gov/fistulas.html |
| free resource | Media Sphera Publishing Group | https://www.mediasphera.ru/issues/current/Neyrohirurg_2018_01_EN/1/11/VoprosyNeirokhirurgii_2018_01_086_EN.pdf | |
| free resource | scite Smart Citations | https://scite.ai/reports/29543220 |