title: The author replies.
authors.affiliation: Renal Division, Emory University, Atlanta, Georgia, USA.
authors.forename: W Charles
authors.initials: WC
authors.lastname: O'Neill
mesh_terms: D017209:Apoptosis; D001940:Breast / Q000098:blood supply*; D054338:Cell Transdifferentiation; D005260:Female; D006801:Humans; D009131:Muscle, Smooth, Vascular / Q000473:pathology*; D010012:Osteogenesis; D051436:Renal Insufficiency, Chronic / Q000473:pathology*; D061205:Vascular Calcification / Q000473:pathology*