多普勒超声和胸片法测定肺动脉高压与心导管术测定法的相关性研究
다보륵초성화흉편법측정폐동맥고압여심도관술측정법적상관성연구
The correlative study on doppler ultrasound ,chest photograph and cardiac catheterization in diagnosing pulmonary hypertension
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