| Name | Info | Provider | Link |
|---|---|---|---|
| subscription/membership/fee required | Ovid Technologies, Inc. | http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=35032385.ui | |
| subscription/membership/fee required | Sheridan PubFactory | https://eje.bioscientifica.com/doi/10.1530/EJE-21-1071 | |
| subscription/membership/fee required | Silverchair Information Systems | https://academic.oup.com/ejendo/article-lookup/doi/10.1530/EJE-21-1071 |