| Label | Id | |
|---|---|---|
| trial study | PROC:CHV | |
| study trials | PROC:CHV | |
| national survey | PROC:CHV | |
| polls | PROC:CHV | |
| poll | PROC:CHV | |
| social survey | PROC:CHV | |
| state survey | PROC:CHV | |
| telephone survey | PROC:CHV | |
| telephone surveys | PROC:CHV | |
| consumer surveys | PROC:CHV | |
| studies vitro | PROC:CHV | |
| study vitro | PROC:CHV | |
| in vitro study | PROC:CHV | |
| studies vivo | PROC:CHV | |
| in vivo study | PROC:CHV |
