Brain natriuretic peptide BNPN-terminal fragment of the prohormoneBNP NT-proBNPHeart failure biomarker detectionOptical labelsImmunoassayBRAIN NATRIURETIC PEPTIDEHIGHLY SENSITIVE DETECTIONEUROPEAN-SOCIETYTASK-FORCECROSS-REACTIVITYESC GUIDELINESIMMUNOASSAYASSOCIATIONDIAGNOSISASSAYS