Beta-blocker use in patients with heart failure with preserved ejection fraction and sinus rhythm Francesc Formiga; David Chivite; Julio Nuñez; Ma Carmen Moreno García; Luis Manzano; José Carlos Arévalo-Lorido; Jose Manuel Cerqueiro; Álvaro García Campos; Joan Carles Trullàs; Manuel Montero-Pérez-Barquero;