title: Letter regarding the article by Katz et al, "Vascular endothelial dysfunction and mortality risk in patients with chronic heart failure".
authors.forename: Jon
authors.initials: J
authors.lastname: Lundberg
authors.forename: Eddie
authors.initials: E
authors.lastname: Weitzberg
mesh_terms: D015415:Biomarkers / Q000032:analysis; D004730:Endothelium, Vascular / Q000503:physiopathology*; D015444:Exercise; D006333:Heart Failure / Q000401:mortality* / Q000503:physiopathology; D006801:Humans; D009569:Nitric Oxide / Q000032:analysis; D012306:Risk; D016019:Survival Analysis
chemical_list: D015415:Biomarkers; D009569:Nitric Oxide