| Name | Info | Provider | Link |
|---|---|---|---|
| subscription/membership/fee required | Ovid Technologies, Inc. | http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=14688514.ui | |
| subscription/membership/fee required | Wolters Kluwer | https://doi.org/10.1097/01.TP.0000093833.02551.0B |