title: Invited Commentary.
authors.affiliation: Division of Cardiothoracic Surgery, Washington University School of Medicine, 1 Barnes Jewish Hospital Plaza, Saint Louis, MO 63110. Electronic address: maniarh@wustl.edu.
authors.forename: Hersh
authors.initials: H
authors.lastname: Maniar
mesh_terms: D006348:Cardiac Surgical Procedures / Q000706:statistics & numerical data*; D002391:Catchment Area, Health / Q000706:statistics & numerical data*; D005260:Female; D006297:Health Services Accessibility / Q000706:statistics & numerical data*; D006331:Heart Diseases / Q000601:surgery*; D006801:Humans; D008297:Male; D012111:Residence Characteristics / Q000706:statistics & numerical data*; D062606:Tertiary Care Centers