Name | Info | Provider | Link |
---|---|---|---|
subscription/membership/fee required | Ovid Technologies, Inc. | http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=31085621.ui | |
subscription/membership/fee required | Silverchair Information Systems | https://academic.oup.com/pmj/article-lookup/doi/10.1136/postgradmedj-2019-136600 |