Jorge Correia-Pinto, MD, PhD
Pediatric Surgery
Gustavo Rocha, MD
Neonatology
Hercília Guimarães, MD, PhD
Neonatology
José Carlos Areias, MD, PhD
Pediatric Cardiology
Hospital São João
4200 Porto, Portugal
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To the Editor.
We read with great interest "Brain-Type Natriuretic Peptide in the Diagnosis and Management of Persistent Pulmonary Hypertension of the Newborn" by Reynolds et al.1 The authors suggest the blood level of brain-type natriuretic peptide (BNP) as a marker that can be used as an adjunct parameter to differentiate newborns