The researchers then focused on the genetic profiles , or genotypes , of more than 1 , 200 men and women whose systolic ( the higher number in a bp reading ) and diastolic ( lower number ) measurements fell at the extreme ? highest and lowest ? percentiles of distribution 然后研究人员就开始研究收缩压（血压读数中高的数值）和舒张压（血压读数中低的数值）属于非常高或非常低水平的1200位男性和女性病人的基因表型。
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