To limit to governmental websites, add the phrase "site:gov" to your search
Sample Search: diabetes site:gov
will retrieve information about diabetes at the CDC, NIH, etc. such as:
Basics | Diabetes | CDC
https://www.cdc.gov/diabetes/basics/diabetes.html
To limit to educational websites, add the phrase "site:edu" to your search
Sample Search: "cystic fibrosis" site:edu
will retrieve information about cystic fibrosis at education sites, such as:
To limit to organization websites, add the phrase "site:org" to your search
Sample Search: "Emery-Dreifuss Muscular Dystrophy" site:org
will retrieve information about Emery-Dreifuss MD at organizational sites, such as:
Emery-Dreifuss Muscular Dystrophy (EDMD) | Muscular Dystrophy ...