Name | Info | Provider | Link |
---|---|---|---|
subscription/membership/fee required | Ovid Technologies, Inc. | http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=16401816.ui | |
subscription/membership/fee required | Silverchair Information Systems | https://jamanetwork.com/journals/jamainternalmedicine/fullarticle/10.1001/archinte.166.1.95 |