| Name | Info | Provider | Link |
|---|---|---|---|
| Mental Retardation | free resource | Genetic Alliance | https://www.diseaseinfosearch.org/result/4607 |
| subscription/membership/fee required | Ovid Technologies, Inc. | http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=20236124.ui | |
| subscription/membership/fee required | Wiley | https://doi.org/10.1111/j.1399-0004.2010.01371.x |