Rationale and Design of the IRON-HF study: a randomized trial to assess the effects of Iron Supplementation in Heart Failure Patients With Anemia - Beck-da-Silva, Luís; Rohde, Luís Eduardo; Pereira-Barretto, Antônio Carlos; Albuquerque, Denilson de; Bocchi, Edimar Alcides; Vilas-Boas, Fábio; Moura, Lídia Zytynzki; Montera, Marcelo W.; Rassi, Salvador; Clausell, Nadine (Journal of Cardiac Failure, 2007)