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研究背景钾与收缩压Effect of increased potassium intake on cardiovascular risk factors and disease:systematic review and meta-analyses.Aburto NJ,et al.BMJ.2013 Apr 3;346:f1378.钾与舒张压Effect of increased potassium intake on cardiovascular risk factors and disease:systematic review and meta-analyses.Aburto NJ,et al.BMJ.2013 Apr 3;346:f1378.