- Correspondence to Dr Gabriele Egidy Assenza, Boston Adult Congenital Heart (BACH) and Pulmonary Hypertension Program, Brigham and Women's Hospital, Boston's Children's Hospital, 300 Longwood Avenue, Boston, MA 02115, USA;
- Received November 9, 2012
- Revised January 7, 2013
- Accepted January 10, 2013
- First published February 13, 2013.
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