| Name | Info | Provider | Link |
|---|---|---|---|
| Choking | free resource | MedlinePlus Health Information | https://medlineplus.gov/choking.html |
| free resource | PubMed Central | https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/20936957/ | |
| free resource | Europe PubMed Central | https://europepmc.org/abstract/MED/20936957 | |
| free resource | NCI CPTC Antibody Characterization Program | https://antibodies.cancer.gov/detail/CPTC-AKR1B1-1 | |
| free resource | Silverchair Information Systems | https://meridian.allenpress.com/angle-orthodontist/article-lookup/doi/10.2319/013010-65.1 |