Int. j. cardiol. Int. j. cardiol. Predictive value of NT-proBNP combined with exercise capacity variables in pulmonary artery disease: Insights from a Spanish cohort. Quezada-Loaiza Carlos A. Flox-Camacho Ángela Santos-Lozano Alejandro Sanchis-Gomar Fabian González-Saiz Laura Sanz-Ayan Paz Garatachea Nuria Universidad de Zaragoza Lucia Alejandro Escribano-Subías Pilar 2015 research-article