Digoxin and prognosis of heart failure in older patients with preserved ejection fraction: Importance of heart rate. Results from an observational and multicenter study. - Llàcer, Pau; Núñez, Julio; Bayés-Genís, Antoni; Conde Martel, Alicia; Cabanes Hernández, Yolanda; Díez Manglano, Jesús; Álvarez Rocha, Pablo; Soler Rangel, Llanos; Gómez Del Olmo, Vicente; Manzano, Luis; Montero Pérez-Barquero, Manuel (European Journal of Internal Medicine, 2019)