| Label | Id | |
|---|---|---|
| studies trials | PROC | |
| trial study | PROC | |
| study trials | PROC | |
| local survey | PROC | |
| national survey | PROC | |
| national survey | PROC | |
| demographic study | PROC | |
| poll | PROC | |
| social survey | PROC | |
| Social survey | PROC | |
| polls | PROC | |
| poll | PROC | |
| social survey | PROC | |
| Poll | PROC | |
| state survey | PROC |