The challenge in a startup is you hit a lot of turbulence, and you want people who understand that it's just turbulence and not a crisis.

Consider calling it a challenge rather than calling it a crisis.

People are used to dealing with risk. You are told if you smoke, you are at higher risk of lung cancer. And I think people are able to also understand, when they are told they are a carrier for a genetic disease, that is not a risk to them personally but something that they could pass on to children.

I did a lot of fun things before I had kids - I traveled a lot. Now, I just really love being with my kids.

It's not just professional athletes and soldiers who are at risk from traumatic brain injury. More than 1.7 million people a year sustain a traumatic brain injury, and about 50,000 of them die each year, according the Centers for Disease Control. There are both emotional and financial costs from these injuries.

A lot of people, they want you to be a one-hit wonder.