Variability of NT-proBNP plasma and urine levels in patients with stable heart failure: a 2-year follow-up study
Raquel Cortés, Miguel Rivera, Antonio Salvador, Vicente Bertomeu, Fernando García de Burgos, Esther Roselló-Lletí, Manuel Portolés, Rafael Payá, Luis Martínez-Dolz, Vicente Climent
Heart Aug 2007, 93 (8) 957-962; DOI: 10.1136/hrt.2006.096891