| Name | Info | Provider | Link |
|---|---|---|---|
| subscription/membership/fee required | Ovid Technologies, Inc. | http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=22735708.ui | |
| free resource | PubMed Central | https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/22735708/ | |
| subscription/membership/fee required | Silverchair Information Systems | https://academic.oup.com/nar/article-lookup/doi/10.1093/nar/gks615 |