title: Sildenafil and exercise capacity in heart failure--in reply.
authors.forename: Margaret M
authors.initials: MM
authors.lastname: Redfield
authors.forename: Barry A
authors.initials: BA
authors.lastname: Borlaug
mesh_terms: D017079:Exercise Tolerance; D005260:Female; D006333:Heart Failure / Q000188:drug therapy* / Q000503:physiopathology*; D006801:Humans; D008297:Male; D058986:Phosphodiesterase 5 Inhibitors / Q000627:therapeutic use*; D010879:Piperazines / Q000627:therapeutic use*; D013450:Sulfones / Q000627:therapeutic use*
chemical_list: D058986:Phosphodiesterase 5 Inhibitors; D010879:Piperazines; D013450:Sulfones