More than likely less than. They have the BDD which will expedite all reviews. Also remember this is a device so the amount of human patients will be drastically reduced from typical FDA trials.
The only thing that may slow things down is how quickly the Mayo Clinic can get the volunteers. Also the Clinic has 3 regional hospitals that they can recruit from as well, it would not surprise me if they reach out to the local hospitals as well.
Time will tell. Hope for the best expect the worst.