Methods Examined renal tubular function and glomerular filtration function in essential hypertension, after excluded renal hypertension by renal artery angiography and creatinine clearance.

方法通过肾动脉造影、内生肌酐清除率排除肾性高血压，检测入选的原发性高血压病患者的肾小球滤过功能指标和肾小管功能指标。

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The study authors, Dr Murray Mittleman and colleagues at the Beth Israel Deaconess Medical Center in Boston, measured kidney function using a recognised test called the glomerular filtration rate (GFR).

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