| Name | Info | Provider | Link |
|---|---|---|---|
| subscription/membership/fee required | Ovid Technologies, Inc. | http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=9758444.ui | |
| free resource | NCI CPTC Antibody Characterization Program | https://antibodies.cancer.gov/detail/CPTC-PTHrP-1 | |
| subscription/membership/fee required | Silverchair Information Systems | https://academic.oup.com/ejendo/article-lookup/doi/10.1530/eje.0.1390323 |