| Label | Id | |
|---|---|---|
| state survey | PROC | |
| telephone survey | PROC | |
| telephone survey | PROC | |
| telephone surveys | PROC | |
| study of one area, group, or program | PROC | |
| multiple group designs | PROC | |
| research involving two or more groups | PROC | |
| research involving two or more studies | PROC | |
| cross-study comparability | PROC | |
| replication study | PROC | |
| environment of study | PROC | |
| in vitro study | PROC | |
| studies vitro | PROC | |
| study vitro | PROC | |
| in vitro study | PROC |