An official website of the United States government
Here's how you know
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
The incidence of pulmonary hypertension according to the degree of bronchopulmonary dysplasia severity. Numbers above the bars indicate the percentage of patients with pulmonary hypertension.