1. From the Department of Cardiovascular and Thoracic Surgery, West Virginia University, Morgantown (N.A.); Washington Adventist Hospital, Takoma Park, MD (N.A.); Inova Fairfax Hospital, Falls Church, VA (N.A.); WVU Heart and Vascular Institute, West Virginia University, Morgantown (S.D.H.); and Inova Medical Group, Fairfax, VA (T.F.).