Persistent pulmonary hypertension of the newborn (PPHN) occurs in approximately 1.9 per 1000 newborns and may be more frequent in developing countries.
平均每1000名新生儿中就会有1.9个有新生儿持续性肺高压，在开发中国家则可能会更频繁。
Persistent pulmonary hypertension of the newborn (PPHN) occurs in approximately 1.9 per 1000 newborns and may be more frequent in developing countries.
平均每1000名新生儿中就会有1.9个有新生儿持续性肺高压，在开发中国家则可能会更频繁。
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