Apologies, bad medicine habit to use ambiguous acronyms. I meant "randomized controlled trial" in this case (as the post). "Randomized clinical trial" is often

Apologies, bad medicine habit to use ambiguous acronyms. I meant "randomized controlled trial" in this case (as the post). "Randomized clinical trial" is often used interchangeably but does not necessarily require a control group (e.g. a non-inferiority study comparing two different treatments).