Substudy Persistent Atrial Fibrillation: A Veterans Affairs Cooperative Studies Program Quality of Life and Exercise Performance in Patients in Sinus Rhythm Versus

An apparatus for reducing hydrogen concentration in exhaust gasof an exhaust system of a fuel cell vehicle includes a bumper cover disposed at a rear portion of the fuel cell vehicle, the bumper cover forming a streamlined exteriorsurface, and an exhaust gasguiding unit interconnecting the exhaust system and the bumper cover, the exhaust gasguiding unit guiding the exhaust gasto the streamlined exteriorsurface of the bumper cover.