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368 Journal of Endovascular Therapy 28 (3) one else has been able to solve is self-propelling. The currency of innovation is not in denominated dollars or euros. Instead, innovation is driven by the individual, internal motivation to create something that heretofore did not exist. It is this sort of innate stimulus that Mark Twain referred to when he said,“Find a job you enjoy doing, and you will never have to work a day in your life.”