| Name | Info | Provider | Link |
|---|---|---|---|
| free resource | Elsevier Science | https://linkinghub.elsevier.com/retrieve/pii/S1726-4901(11)00255-3 | |
| subscription/membership/fee required | Ovid Technologies, Inc. | http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=22240535.ui | |
| subscription/membership/fee required | Wolters Kluwer | https://doi.org/10.1016/j.jcma.2011.09.015 |