| Label | Id | |
|---|---|---|
| NONRANDOMIZED CONTROL TRIALS | PROC | |
| BLIND | PROC | |
| BLINDED | PROC | |
| Blinded | PROC | |
| Blind | PROC | |
| Blinding | PROC | |
| blinded | PROC | |
| masked | PROC | |
| UNAWARE | PROC | |
| unaware | PROC | |
| do quality assurance testing | PROC | |
| testing quality assurance | PROC | |
| quality assurance testing | PROC | |
| experimentation | PROC | |
| satellite photography | PROC |