What organizations is Dr. Barrera affiliated with?
Dr. Barrera is a member of the Clinical Advisory Committee of the National MS Society, the Multiple Sclerosis Foundation Advisory Board, and the Consortium of Multiple Sclerosis Centers.
Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
What organizations is Dr. Barrera affiliated with?

### Input: Not applicable

### Response:
Dr. Barrera is a member of the Clinical Advisory Committee of the National MS Society, the Multiple Sclerosis Foundation Advisory Board, and the Consortium of Multiple Sclerosis Centers.<|im_end|>