| Name | Info | Provider | Link |
|---|---|---|---|
| Heart Surgery | free resource | MedlinePlus Health Information | https://medlineplus.gov/heartsurgery.html |
| subscription/membership/fee required | Ovid Technologies, Inc. | http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=32998167.ui | |
| subscription/membership/fee required | Georg Thieme Verlag Stuttgart, New York | https://www.thieme-connect.com/DOI/DOI?10.1055/s-0040-1716324 |