| Name | Info | Provider | Link |
|---|---|---|---|
| subscription/membership/fee required | HighWire | https://adc.bmj.com/lookup/pmidlookup?view=long&pmid=20656737 | |
| Vitamin D Deficiency | free resource | MedlinePlus Health Information | https://medlineplus.gov/vitaminddeficiency.html |
| subscription/membership/fee required | Ovid Technologies, Inc. | http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=20656737.ui |