Response to “Efficacy and safety of sildenafil for the treatment of severe pulmonary hypertension in patients with hemoglobinopathies: results from a long-term follow up ” Haematologica 2014;99(2):e17–18.

• Elizabeth S. Klings,
• Elliott P. Vichinsky,
• Claudia R. Morris

Affiliations

Elizabeth S. Klings

The Pulmonary Center, Boston University School of Medicine, Boston, MA

Elliott P. Vichinsky

Department of Hematology/Oncology, Children’s Hospital & Research Center Oakland, Oakland, CA

Claudia R. Morris

Department of Pediatrics, Emory University School of Medicine, Atlanta, GA, USA