| Name | Info | Provider | Link |
|---|---|---|---|
| subscription/membership/fee required | Elsevier Science | https://linkinghub.elsevier.com/retrieve/pii/00006396-199305000-00015 | |
| Headache | free resource | MedlinePlus Health Information | https://medlineplus.gov/headache.html |
| subscription/membership/fee required | Ovid Technologies, Inc. | http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=8336993.ui | |
| free resource | NCI CPTC Antibody Characterization Program | https://antibodies.cancer.gov/detail/CPTC-HLA-B-1 | |
| subscription/membership/fee required | Wolters Kluwer | https://doi.org/10.1016/0304-3959(93)90085-4 |