Name | Info | Provider | Link |
---|---|---|---|
Vitamin A | free resource | MedlinePlus Health Information | https://medlineplus.gov/vitamina.html |
subscription/membership/fee required | Ovid Technologies, Inc. | http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=20113385.ui | |
subscription/membership/fee required | Wiley | https://doi.org/10.1111/j.1365-277X.2009.01026.x |