How many years of experience does Dr. Brennan have in clinical research and management positions?
Dr. Brennan has over 20 years of experience in clinical research and more than 15 years in management positions.
Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
How many years of experience does Dr. Brennan have in clinical research and management positions?

### Input: Not applicable

### Response:
Dr. Brennan has over 20 years of experience in clinical research and more than 15 years in management positions.<|im_end|>