| Name | Info | Provider | Link |
|---|---|---|---|
| subscription/membership/fee required | Ovid Technologies, Inc. | http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=18950449.ui | |
| subscription/membership/fee required | Wiley | https://doi.org/10.1111/j.1526-4637.2008.00515.x | |
| subscription/membership/fee required | Silverchair Information Systems | https://academic.oup.com/painmedicine/article-lookup/doi/10.1111/j.1526-4637.2008.00515.x |