An Enterprising Biotechnologist
After spilling liquid nitrogen while freezing off a patient's wart, John Dobak saw a need for a self-contained cryosurgery system that protected its chilled contents. He became an entrepreneur and based his first company, Cryogen, on this idea; soon after, he founded ­InnerCool Therapies, which specializes in cardiac and stroke treatments. "I try to understand where the big problems are, where there are unmet clinical needs, and then determine if there's a way to make an advancement," he says.

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