A catalog can be constituted-of-or-filled-with randomized trials.
A randomized trial can be constituted-of-or-filled-with treatment.
A series can be constituted-of-or-filled-with randomized clinical trials.
(Insurance coverage) can be constituted-of-or-filled-with randomized controlled trials.
A randomized trial can be constituted-of-or-filled-with some (breast cancer patients).