| Name | Info | Provider | Link |
|---|---|---|---|
| subscription/membership/fee required | Elsevier Science | https://linkinghub.elsevier.com/retrieve/pii/S1072-7515(10)00024-4 | |
| subscription/membership/fee required | Ovid Technologies, Inc. | http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=20347751.ui | |
| subscription/membership/fee required | Wolters Kluwer | https://doi.org/10.1016/j.jamcollsurg.2010.01.016 |