Name | Info | Provider | Link |
---|---|---|---|
subscription/membership/fee required | Ovid Technologies, Inc. | http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=38832627.ui | |
subscription/membership/fee required | Silverchair Information Systems | https://academic.oup.com/pmj/article-lookup/doi/10.1093/postmj/qgae067 |