Daan Heerma van Voss is not just anxious. According to tests on the cortisone levels in his hair, he is seventy-four times as anxious as the average person. And that makes him hard to live with. When another relationship is broken by his crippling fears, the only way to cope is to get to the roots of his condition. But he also wants to dig deeper and tackle the big questions. Why are 264 mil…