ST. LOUIS When 2-year-old Owen Stark arrived at St. Louis Children's Hospital , he wasn't given much chance for survival. But doctors used a German-built artificial lung that stabilized him so well that, at least for now, he no longer needs a lung transplant. Owen, of Eldon, was diagnosed earlier this year with idiopathic pulmonary hypertension or high blood pressure in the lungs. He was in ...