title: Exercise testing in heart failure: maximal, submaximal, or both?
authors.forename: Vera
authors.initials: V
authors.lastname: Bittner
mesh_terms: D005080:Exercise Test / Q000379:methods*; D006333:Heart Failure / Q000401:mortality* / Q000601:surgery; D016027:Heart Transplantation; D006801:Humans; D011379:Prognosis; D018570:Risk Assessment